The Layman's Lantern emblem Lucerna Memoriae

A Catholic Latin Primer

From the altar to the page — getting started in the language of the Church.

Pater noster, qui es in caelis…

Michelangelo, the dome of St Peter’s Basilica (1547–1590), Vatican City — its cupola mosaics designed by Cavaliere d’Arpino

“Latin, preserved for posterity, proved to be a bond of unity for the Christian peoples of Europe.”

Pope John XXIII · Veterum Sapientia, 1962

How to Use This Primer

This primer is for the Catholic who wants to understand the Latin Mass, pray the Church’s ancient prayers with comprehension, and begin reading the language of two thousand years of Catholic tradition. No prior knowledge of Latin is assumed.

Each lesson builds on the last. Work through them in order, memorize the vocabulary, and practise on the prayers you already know by heart — you have been saying Latin for years without being told so.

  • Follow the MassRead the Ordinary in Latin and know what every response means.
  • Pray with understandingSay the Pater Noster, Ave María, and Credo in the Church’s own words.
  • Read the VulgateParse simple verses of St Jerome’s Bible word by word.
  • Build furtherOpen any standard Latin grammar without being lost on the first page.

The eight parts

Part I

The Sounds of Latin

Before grammar, the ear. Latin is spoken exactly as it is written, and there is nothing in it you cannot already pronounce.

Lesson 1

The Alphabet and Pronunciation

The Latin alphabet has 23 letters — there is no W, and J and U are later additions standing in for I and V. For our purposes we use the full modern alphabet as it is printed in Catholic missals.

Vowels each has one sound, always

Latin vowels are pure. They do not glide the way English vowels do; each has one consistent sound wherever it appears.

LetterEcclesiastical soundExampleMeaning
A“ah” as in fathergrátiagrace
E“eh” as in bedDeusGod
I“ee” as in feetinin
O“oh” as in goDóminusLord
U“oo” as in foodunusone

Diphthongs two vowels, one sound

DiphthongSoundExampleMeaning
ae“ay” as in daycaelumheaven
oe“ay” — the same as aepoenapunishment
au“ow” as in howlaudámuswe praise

Consonants where Latin parts company with English

Most consonants are pronounced as in English. These are the exceptions that matter.

Letter or groupEcclesiastical soundExampleNote
C before e, i, ae, oe“ch” as in churchcaelum = “CHAY-loom”The key rule
C elsewhere“k”corpus = “KOR-poos”
G before e, isoft “j”Regina = “Reh-JEE-nah”
G elsewherehard “g”grátia = “GRAH-tsyah”
SC before e, i“sh”ascéndit = “ah-SHEN-dit”
TI before a vowel“tsee”grátia = “GRAH-tsyah”See the exception below
GN“ny”Agnus = “AH-nyoos”
V“v” — as in Englishverbum = “VEHR-boom”
Hsilent, or nearly sohomo = “OH-moh”
Rslightly rolledRex

Stress where the weight of the word falls

In a word of two syllables, always stress the first: Dó-mi-nus, Pá-ter.

In a word of three or more syllables, stress the second-to-last if it is “long” — that is, if it contains a long vowel or is followed by two consonants. Otherwise stress the third-to-last.

For now, let the accent marks in your missal and in this primer guide you: grátia, Dóminus, benedíctus.

Practice read these aloud before you translate them

  • DeusDAY-oosGod
  • SanctusSANK-toosHoly
  • caelumCHAY-loomheaven
  • paxpahkspeace
  • ReginaReh-JEE-nahQueen
  • AgnusAH-nyoosLamb
  • grátiaGRAH-tsyahgrace
  • EcceEH-chehBehold
  • Excelsisex-CHEL-seeson high
  • misericórdiamee-seh-ree-KOR-dyahmercy
Part II

Grammar Essentials

Eight short lessons. Latin puts its grammar on the ends of its words, so learning the endings is learning the language.

Lesson 2

How Latin Works — The Cases

The most important thing to understand about Latin is that word order is flexible, because the ending of a word tells you its role in the sentence. Those endings are called cases.

English uses word order to carry meaning: “The Lord loves the soul” is not the same sentence as “The soul loves the Lord.”

Latin uses case endings instead. Dóminus ámat ánimam and Ánimam ámat Dóminus both mean “The Lord loves the soul.” The ending -am on ánimam marks it as the object wherever it stands in the line.

The six cases

CaseRoleEnglish equivalent
NominativeSubject — who or what does the action“the Lord” — Dóminus
GenitivePossession — of, belonging to“of the Lord” — Dómini
DativeIndirect object — to, for“to the Lord” — Dómino
AccusativeDirect object — receives the action“the Lord” — Dóminum
AblativeMeans, manner, place, accompaniment“by, with, from the Lord” — Dómino
VocativeDirect address“O Lord!” — Dómine

Lesson 3

First Declension Nouns

mostly feminine, base ending -a

The First Declension holds mostly feminine nouns, and they are among the commonest words in Catholic Latin: ánima (soul), écclesia (church), María, grátia (grace), víta (life), glória (glory), via (way).

Pattern: via way, road — feminine, fully regular

CaseSingularPlural
Nominativeviaviae
Genitiveviaeviárum
Dativeviaeviis
Accusativeviamvias
Ablativeviāviis
Vocativeviaviae

A special case: ánima soul

Ánima — as in the Anima Christi — follows via in the singular, but takes the older ending -ábus in the dative and ablative plural: animábus. The odd form keeps it distinct from ánimis, which belongs to the masculine noun ánimus (mind, spirit). Only a handful of nouns do this (fília → filiábus, dea → deábus); do not generalize -ábus to the rest of the declension.

* Special form; the regular ending would be ánimis.
CaseSingularPlural
Nominativeánimaánimae
Genitiveánimaeanimárum
Dativeánimaeanimábus*
Accusativeánimamánimas
Ablativeánimāanimábus*
Vocativeánimaánimae

Essential first-declension vocabulary

ánima
soul
Anima Christi
écclesia
Church
“ecclesial,” Ecclesia Dei
glória
glory
Gloria in Excelsis
grátia
grace
Ave María, grátia plena
María
Mary
All the Marian prayers
víta
life
vita aetérna — eternal life
via
way, road
Via Crucis — Stations of the Cross
aqua
water
aqua benedicta — holy water
terra
earth, land
et in terra pax
rosa
rose
Rosárium — the Rosary
porta
gate, door
porta caeli — gate of heaven
hora
hour
Liturgia Horárum — Liturgy of the Hours
cena
supper
Cena Dómini — Supper of the Lord

Lesson 4

Second Declension Nouns

masculine in -us or -er, neuter in -um

The Second Declension holds most masculine nouns, ending in -us or -er, and the neuter nouns ending in -um.

Pattern A: Dóminus Lord — masculine

CaseSingularPlural
NominativeDóminusDómini
GenitiveDóminiDominórum
DativeDóminoDóminis
AccusativeDóminumDóminos
AblativeDóminoDóminis
VocativeDómineDómini

Pattern B: verbum word — neuter

Neuter nouns have the same form in the nominative and the accusative — in both numbers.

CaseSingularPlural
Nominativeverbumverba
Genitiveverbiverbórum
Dativeverboverbis
Accusativeverbumverba
Ablativeverboverbis

Essential second-declension vocabulary

Deusm.
God
Throughout
Dóminusm.
Lord
Sanctus, Agnus Dei
Fíliusm.
Son
Credo
ángelusm.
angel
The Angelus
caelumn.
heaven
Et in terra pax
verbumn.
word
Verbum Dei — Word of God
templumn.
temple
peccátumn.
sin
qui tollis peccáta mundi
regnumn.
kingdom
regnum caelórum — Kingdom of Heaven
signumn.
sign
signum crucis — sign of the cross
sacrifíciumn.
sacrifice
sacrifícium laudis
mystériumn.
mystery
Mystérium Fídei — Mystery of Faith

A short box: the fourth declension -us, genitive -ūs

A small declension, but an important one. Its nouns end in -us like Dóminus, yet their genitive singular ends in -ūs with a long u, and — crucially for prayer — their dative singular ends in -ui. Two of the most frequent words in Catholic Latin belong here.

CaseSpíritus — spirit, m.fructus — fruit, m.
NominativeSpíritusfructus
GenitiveSpíritūsfructūs
DativeSpirítuifrúctui
AccusativeSpíritumfructum
AblativeSpíritufructu

Lesson 5

Third Declension Nouns

the largest and most varied

The Third Declension includes nouns of all three genders. The key is to learn the genitive singular, because that form reveals the stem from which every other ending is built.

Pattern: pax peace — feminine

CaseSingularPlural
Nominativepaxpaces
Genitivepacispacum
Dativepacipácibus
Accusativepacempaces
Ablativepacepácibus
Vocativepaxpaces

Essential third-declension vocabulary

paxgen. pacis, f.
peace
Pax Dómini, Agnus Dei
luxgen. lucis, f.
light
lux aetérna — eternal light
cruxgen. crucis, f.
cross
Via Crucis
voxgen. vocis, f.
voice
vox clamántis — a voice crying out
homogen. hóminis, m.
man, person
et in terra pax homínibus
Rexgen. Regis, m.
King
Rex Gloriae — King of Glory
Patergen. Patris, m.
Father
Pater Noster
nomengen. nóminis, n.
name
in nómine Patris
corpusgen. córporis, n.
body
Corpus Christi
tempusgen. témporis, n.
time
in tempus — in time
amorgen. amóris, m.
love
sanguisgen. sánguinis, m.
blood
Sanguis Christi
fidesgen. fídei, f. — 5th decl.
faith
Mystérium Fídei
spesgen. spei, f. — 5th decl.
hope
spes nostra — our hope

Lesson 6

Adjectives

agreement in gender, number, and case

A Latin adjective must agree with the noun it modifies in gender, number, and case. Nothing else is required of it — and nothing less is permitted.

First and second declension adjectives -us / -a / -um

The commonest type. The masculine follows the second declension, the feminine the first, and the neuter the second neuter.

FormMasculineFeminineNeuter
Nominative sg.sanctussanctasanctum
Nominative pl.sanctisanctaesancta

Agreement in practice

Examples

  • Spíritus Sanctusthe Holy Spirit — sanctus agrees with Spíritus (m.)
  • María SanctaHoly Mary — sancta agrees with María (f.)
  • Sanctum Evangéliumthe Holy Gospel — sanctum agrees with Evangélium (n.)
  • Ecce Agnus DeiBehold the Lamb of God — Agnus is masculine
  • Magna ánimaa great soul (f.)
  • verbum aetérnumthe eternal word (n.)

Common first and second declension adjectives

sanctus / a / um
holy
Spíritus Sanctus
magnus / a / um
great
O Magnum Mystérium
bonus / a / um
good
bonum — the good
aetérnus / a / um
eternal
vita aetérna
beátus / a / um
blessed, happy
Beáta María; Beátus vir (Ps. 1)
benedíctus / a / um
blessed, praised
Benedíctus qui venit
verus / a / um
true
vere dignum — truly worthy
novus / a / um
new
Novum Testaméntum
primus / a / um
first
unus / a / um
one
unam, sanctam, cathólicam — Credo
omnípotens3rd decl.
almighty
Pater omnípotens

Lesson 7

Pronouns

Personal pronouns

PersonSingularPlural
1stego — Inos — we
2ndtu — youvos — you all
3rd masculineis — heei / ii — they
3rd feminineea — sheeae — they
3rd neuterid — itea — they

The dative forms used constantly in prayer

  • mihito me, for me — Fiat mihi secúndum verbum tuum, “Be it done unto me according to thy word” (Luke 1:38)
  • tibito you, for you — tibi grátias ágimus, “we give thanks to you”
  • nobisto us, for us — dona nobis pacem, “give us peace”
  • vobisto you, plural — Pax vobíscum, “peace be with you”

Demonstrative pronouns

LatinMeaningExample
hic / haec / hocthis — near at handHoc est corpus meum — This is my body
ille / illa / illudthat — far off, or “the famous”ille Agnus — that Lamb
ipse / ipsa / ipsumhimself, herself, itself — emphaticDeus ipse — God himself

Lesson 8

Verbs — The Four Conjugations

Latin verbs fall into four conjugations, sorted by the vowel of the infinitive.

ConjugationInfinitive endingExampleMeaning
1st-āreamáreto love
2nd-ēre — long ehabéreto have
3rd-ĕre — short edícereto say
4th-īreaudíreto hear

Present tense: amáre to love — first conjugation

PersonSingularPlural
1stamo — I loveamámus — we love
2ndamas — you loveamátis — you all love
3rdamat — he, she, it lovesamant — they love

Present tense: esse to be — irregular, and essential

PersonSingularPlural
1stsum — I amsumus — we are
2ndes — you areestis — you are
3rdest — he, she, it issunt — they are

Key Catholic verbs present tense

InfinitiveMeaning1st sg.3rd sg.1st pl.
oráreto prayorooratorámus
laudáreto praiselaudolaudatlaudámus
adoráreto adoreadoroadoratadorámus
benedícereto blessbenedícobenedícitbenedícimus
crédereto believecredocréditcrédimus
veníreto comeveniovenitvenímus
dareto givedodatdamus
dícereto saydicodicitdícimus
fácereto make, to dofáciofacitfácimus
habéreto havehabeohabethabémus
audíreto hearaudioauditaudímus
salváreto savesalvosalvatsalvámus
miserérito have mercy — deponentmiséreormiseréturmiserémur

The imperative commands, and therefore petitions

The imperative is the mood of the liturgical response. Half of what you say at Mass is in it.

InfinitiveSingularPluralAs you hear it
oráreoraoráteOra pro nobis — Pray for us
veníreveniveníteVeni, Sancte Spíritus; Veníte adorémus
adoráreadóraadoráteAdoráte Dóminum — Adore the Lord
mítteremittemíttiteEmítte Spíritum tuum — Send forth thy Spirit
donáredonadonáteDona nobis pacem — Grant us peace

Lesson 9

Prepositions and Fixed Phrases

A Latin preposition governs either the accusative or the ablative. Learning which is half of learning the preposition.

Prepositions with the accusative

PrepositionMeaningExample
adto, towardad Deum — to God
ininto, against — motionin saecula saeculórum — into ages of ages
perthrough, byper Christum Dóminum nostrum — through Christ our Lord
antebeforeante saecula — before the ages
postafterpost Commúnionem — after Communion
propteron account of, for the sake ofpropter magnam glóriam tuam — for thy great glory

Prepositions with the ablative

PrepositionMeaningExample
inin, among — place or statein caelo — in heaven
cumwithcum Sancto Spíritu — with the Holy Spirit
defrom, about, concerningde profúndis — out of the depths (Ps. 130)
ex / eout of, fromex María Vírgine — from the Virgin Mary
sinewithoutsine macula — without stain
a / abby, froma Spíritu Sancto — by the Holy Spirit
profor, on behalf ofpro nobis — for us; pro peccátis — for sins

Fixed phrases memorize these whole

These occur so often that it is wasted effort to parse them every time. Learn them as single units and the liturgy opens.

PhraseLiterallyWhere you meet it
per ómnia saécula saeculórumthrough all ages of agesforever and ever
per Christum Dóminum nostrumthrough Christ our Lordliturgical conclusion
in nómine Patris et Fílii et Spíritus Sanctiin the name of the Father and of the Son and of the Holy Spiritthe Sign of the Cross
Deo grátiasthanks to GodThanks be to God
Laus tibi, Christepraise to thee, O Christafter the Gospel
Dóminus vobíscumthe Lord be with youliturgical greeting
et cum spíritu tuoand with thy spiritthe response
Ite, missa estgo, it is sent forththe end of Mass
mea culpathrough my faultthe Confíteor
Agnus DeiLamb of Godthe fraction rite
eccebeholdEcce Agnus Dei
fiatlet it be doneFiat voluntas tua — Thy will be done
ora pro nobispray for usthe Litanies
Requiem aetérnameternal restthe Office of the Dead
lux perpétuaperpetual lightthe Office of the Dead
Sursum cordalift up your heartsthe Preface dialogue
Vere dignumtruly worthy and fittingthe Preface opening
Sanctus, Sanctus, SanctusHoly, Holy, Holythe Sanctus
Part III

The Prayers of the Church

You already know these by heart in English. Here they are in Latin, with the grammar named line by line — which is the fastest way any adult learns a language.

Prayer 1

The Sign of the Cross

Signum Crucis

In nómine Patris et Fílii et Spíritus Sancti. Amen.

In EnglishIn the name of the Father, and of the Son, and of the Holy Spirit. Amen.

Word by word

  • inin
  • nóminename — ablative of nomen
  • Patrisof the Father — genitive of Pater
  • etand
  • Fíliiof the Son — genitive of Fílius
  • et Spíritus Sanctiand of the Holy Spirit — genitive of Spíritus Sanctus
  • AmenHebrew: so be it

Prayer 2

The Our Father

Pater Noster

Pater noster, qui es in caelis, sanctificétur nomen tuum.

Advéniat regnum tuum. Fiat volúntas tua, sicut in caelo et in terra.

Panem nostrum quotidiánum da nobis hódie, et dimítte nobis débita nostra, sicut et nos dimíttimus debitóribus nostris.

Et ne nos indúcas in tentatiónem, sed líbera nos a malo. Amen.

Line by line

  1. Pater nosterOur Fathernoster = our — an adjective agreeing with Pater
  2. qui es in caeliswho art in heavenqui = who; es = thou art; caelis = ablative plural of caelum
  3. sanctificétur nomen tuumhallowed be thy namesanctificétur = passive subjunctive of sanctificáre — “let it be made holy”
  4. advéniat regnum tuumthy kingdom comeadvéniat = subjunctive of adveníre — “let it come”
  5. fiat volúntas tuathy will be donefiat = subjunctive — “let it be done”
  6. sicut in caelo et in terraon earth as it is in heavensicut = just as
  7. Panem nostrum quotidiánumour daily breadpanem = accusative of panis (3rd decl., m.); quotidiánum = daily
  8. da nobis hódiegive us this dayda = imperative of dare; nobis = to us; hódie = today
  9. et dimítte nobis débita nostraand forgive us our trespassesdimítte = imperative of dimíttere; débita = debts, trespasses
  10. sicut et nos dimíttimusas we forgive
  11. debitóribus nostristhose who trespass against usdebitóribus = dative plural — “to our debtors”
  12. et ne nos indúcas in tentatiónemand lead us not into temptationne … indúcas = a negative subjunctive
  13. sed líbera nos a malobut deliver us from evillíbera = imperative; a malo = from evil, ablative
  14. AmenAmen

Prayer 3

The Hail Mary

Ave María

Ave María, grátia plena, Dóminus tecum.

Benedícta tu in muliéribus, et benedíctus fructus ventris tui, Iesus.

Sancta María, Mater Dei, ora pro nobis peccatóribus, nunc et in hora mortis nostrae. Amen.

Line by line

  1. Ave MaríaHail, MaryAve = imperative of avére, “be well”; María is vocative
  2. grátia plenafull of gracegrátia = grace (nom.); plena = full (f. nom.)
  3. Dóminus tecumthe Lord is with theetecum = cum te — “with thee,” the preposition suffixed
  4. benedícta tu in muliéribusblessed art thou among womenbenedícta = blessed (f.); muliéribus = ablative pl. of mulier
  5. et benedíctus fructus ventris tuiand blessed is the fruit of thy wombfructus = fruit (m., 4th decl., nom.); ventris = of the womb, gen. of venter
  6. IesusJesus
  7. Sancta MaríaHoly Marysancta = holy (f.)
  8. Mater DeiMother of GodMater = Mother; Dei = of God, genitive of Deus
  9. ora pro nobis peccatóribuspray for us sinnersora = imperative; nobis and peccatóribus are both ablative, governed by pro — peccatóribus stands in apposition to nobis, “for us — sinners”
  10. nunc et in hora mortis nostraenow and at the hour of our deathhora = hour; mortis = of death, gen. of mors
  11. AmenAmen

Prayer 4

The Glory Be

Glória Patri

Glória Patri, et Fílio, et Spirítui Sancto.

Sicut erat in princípio, et nunc et semper, et in saécula saeculórum. Amen.

In EnglishGlory be to the Father, and to the Son, and to the Holy Spirit. As it was in the beginning, is now, and ever shall be, world without end. Amen.

Key grammar

  • Glóriaglory — nominative: “glory [be]”
  • Patri, Fílio, Spirítui Sanctoall three in the dative: glory to the Father, to the Son, to the Holy Spirit. Note Spirítui — the fourth-declension dative from Lesson 4, not Spírito
  • sicut eratjust as it was — erat is the imperfect of esse
  • in princípioin the beginning — compare Genesis 1:1 and John 1:1 in the Vulgate: In princípio erat Verbum
  • nunc et sempernow and always
  • in saécula saeculóruminto ages of ages — forever and ever

Prayer 5

The Confíteor

I confess

The Confíteor is prayed at the beginning of Mass. The traditional (1962) form is given here; the modern Roman Missal uses a shorter version, noted below.

Confíteor Deo omnipoténti, beátae Maríae semper Vírgini, beáto Michaéli Archángelo, beáto Ioánni Baptístae, sanctis Apóstolis Petro et Paulo, ómnibus Sanctis, et vobis, fratres: quia peccávi nimis cogitatióne, verbo et ópere: mea culpa, mea culpa, mea máxima culpa.

Ídeo precor beátam Maríam semper Vírginem, beátum Michaélem Archángelum, beátum Ioánnem Baptístam, sanctos Apóstolos Petrum et Paulum, omnes Sanctos, et vos, fratres, oráre pro me ad Dóminum Deum nostrum.

In EnglishI confess to almighty God, to blessed Mary ever-Virgin, to blessed Michael the Archangel, to blessed John the Baptist, to the holy Apostles Peter and Paul, to all the Saints, and to you, brethren, that I have sinned exceedingly in thought, word, and deed: through my fault, through my fault, through my most grievous fault. Therefore I beseech blessed Mary ever-Virgin, blessed Michael the Archangel, blessed John the Baptist, the holy Apostles Peter and Paul, all the Saints, and you, brethren, to pray for me to the Lord our God.

Selected grammar

  • ConfíteorI confess — first person singular of confitéri, a deponent verb: passive in form, active in meaning
  • Deo omnipoténtito almighty God — dative, the one confessed to; omnipoténti agrees with Deo
  • beátae Maríae semper Vírginito blessed Mary ever-Virgin — every word dative
  • quia peccávithat I have sinned — peccávi is the perfect tense
  • cogitatióne, verbo et óperein thought, word, and deed — three ablatives of means
  • mea culpa, mea máxima culpathrough my fault, through my most grievous fault — ablative; máxima is the superlative of magnus
  • ídeo precortherefore I beseech — precor is also deponent
  • oráre pro meto pray for me — pro + the ablative me

Prayer 6

The Apostles’ Creed

Symbolum Apostolórum

Credo in Deum, Patrem omnipoténtem, Creatórem caeli et terrae.

Et in Iesum Christum, Fílium eius únicum, Dóminum nostrum: qui concéptus est de Spíritu Sancto, natus ex María Vírgine, passus sub Póntio Piláto, crucifíxus, mórtuus, et sepúltus. Descéndit ad ínferos. Tértia die resurréxit a mórtuis. Ascéndit ad caelos, sedet ad déxteram Dei Patris omnipoténtis. Inde ventúrus est iudicáre vivos et mórtuos.

Credo in Spíritum Sanctum, sanctam Ecclésiam cathólicam, Sanctórum communiónem, remissiónem peccatórum, carnis resurrectiónem, vitam aetérnam. Amen.

Selected word analysis

  1. CredoI believefirst person singular present of crédere
  2. in Deumin GodDeum = accusative after in — the direction of belief
  3. Patrem omnipoténtemthe almighty FatherPatrem = accusative; omnipoténtem = accusative adjective
  4. CreatóremCreatoraccusative of Creator (3rd decl.)
  5. caeli et terraeof heaven and earthgenitives — the Creator of heaven and of earth
  6. únicumonly, only-begottencompare unigénitum in the Nicene Creed
  7. concéptus estwas conceivedpassive perfect of concípere
  8. natus ex María Vírgineborn of the Virgin Marynatus = born, a participle; ex + ablative
  9. passushaving sufferedperfect participle of pati, deponent
  10. crucifíxuscrucifiedpast participle of crucifígere
  11. resurréxithe rose againperfect tense of resúrgere
  12. ascéndithe ascendedperfect of ascéndere
  13. sedethe sitspresent of sedére
  14. déxteramthe right handdéxtera = right hand
  15. iudicáreto judgeinfinitive of iudicáre
  16. vivos et mórtuosthe living and the deadaccusative plurals
  17. remissiónem peccatórumthe forgiveness of sinsremissiónem = accusative; peccatórum = genitive plural
  18. carnis resurrectiónemthe resurrection of the fleshcarnis = of the flesh, genitive of caro
  19. vitam aetérnamlife everlastingaccusative of vita; aetérnam agrees, f. acc.

Prayer 7

The Nicene Creed

Symbolum Nicaénum

This is the longer Creed professed at Sunday Mass. The Apostles’ Creed above is its shorter, older cousin, used in the Rosary and at Baptism; the Nicene Creed is the one you will actually recite standing at Mass, so it is worth learning even before the other.

Credo in unum Deum, Patrem omnipoténtem, factórem caeli et terrae, visibílium ómnium et invisibílium. Et in unum Dóminum Iesum Christum, Fílium Dei unigénitum. Et ex Patre natum ante ómnia saécula. Deum de Deo, lumen de lúmine, Deum verum de Deo vero. Génitum, non factum, consubstantiálem Patri: per quem ómnia facta sunt.

Qui propter nos hómines et propter nostram salútem descéndit de caelis. Et incarnátus est de Spíritu Sancto ex María Vírgine: et homo factus est. Crucifíxus étiam pro nobis: sub Póntio Piláto passus, et sepúltus est. Et resurréxit tértia die, secúndum Scriptúras. Et ascéndit in caelum: sedet ad déxteram Patris. Et íterum ventúrus est cum glória iudicáre vivos et mórtuos: cuius regni non erit finis.

Et in Spíritum Sanctum, Dóminum et vivificántem: qui ex Patre Filióque procédit. Qui cum Patre et Fílio simul adorátur et conglorificátur: qui locútus est per Prophétas. Et unam, sanctam, cathólicam et apostólicam Ecclésiam. Confíteor unum baptísma in remissiónem peccatórum. Et exspécto resurrectiónem mortuórum. Et vitam ventúri saéculi. Amen.

In EnglishI believe in one God, the Father almighty, maker of heaven and earth, of all things visible and invisible. And in one Lord Jesus Christ, the Only-Begotten Son of God, born of the Father before all ages. God from God, Light from Light, true God from true God, begotten, not made, consubstantial with the Father; through him all things were made. For us men and for our salvation he came down from heaven, and by the Holy Spirit was incarnate of the Virgin Mary, and became man. For our sake he was crucified under Pontius Pilate, he suffered and was buried, and rose again on the third day in accordance with the Scriptures. He ascended into heaven and is seated at the right hand of the Father. He will come again in glory to judge the living and the dead, and his kingdom will have no end. And in the Holy Spirit, the Lord, the giver of life, who proceeds from the Father and the Son, who with the Father and the Son is adored and glorified, who has spoken through the prophets. And in one, holy, catholic and apostolic Church. I confess one Baptism for the forgiveness of sins, and I look forward to the resurrection of the dead and the life of the world to come. Amen.

Selected grammar highlights

  1. Credo in unum DeumI believe in one Godunum = accusative of unus, agreeing with Deum
  2. factóremmakeraccusative of factor — parallel to Creatórem in the Apostles’ Creed
  3. visibílium ómnium et invisibíliumof all things visible and invisiblegenitive plurals
  4. unigénitumonly-begottenunus + génitus, “born”; accusative, agreeing with Fílium
  5. ante ómnia saéculabefore all agesante + accusative
  6. lumen de lúmineLight from Lightlumen = nom./acc. of lumen (n.); lúmine = ablative after de
  7. consubstantiálem Patriconsubstantial with the Fatherconsubstantiálem = accusative adjective; Patri = dative
  8. per quem ómnia facta suntthrough whom all things were madeper + accusative quem; facta sunt = passive perfect
  9. propter nos hóminesfor us menpropter + accusative
  10. incarnátus estwas made fleshpassive perfect of incarnáre
  11. Filióqueand from the SonFílio, ablative, + the enclitic -que, “and” — the famous Filioque clause
  12. cuius regni non erit finisof whose kingdom there will be no endcuius = genitive of qui; erit = future of esse
  13. vivificántemthe giver of lifea present participle, “life-making,” agreeing with Spíritum
  14. exspéctoI look forward tofirst singular present of exspectáre
  15. vitam ventúri saéculithe life of the age to comeventúri = future participle in the genitive, agreeing with saéculi

Prayer 8

The Gloria

Glória in Excélsis Deo

Glória in excélsis Deo et in terra pax homínibus bonae voluntátis.

Laudámus te. Benedícimus te. Adorámus te. Glorificámus te.

Grátias ágimus tibi propter magnam glóriam tuam.

In EnglishGlory to God in the highest, and on earth peace to men of good will. We praise thee. We bless thee. We adore thee. We glorify thee. We give thee thanks for thy great glory.

Grammar highlights

  • in excélsisin the highest — ablative plural of excélsus
  • Deodative: glory to God
  • homínibusdative plural of homo: peace to men
  • bonae voluntátisof good will — both words genitive singular
  • Laudámus, Benedícimus, Adorámus, Glorificámusall first person plural present: “we …”
  • tibidative of tu: thanks to thee
  • propter magnam glóriam tuamon account of thy great glory — propter + accusative

Prayer 9

The Sanctus

Sanctus, Sanctus, Sanctus, Dóminus Deus Sábaoth.

Pleni sunt caeli et terra glória tua. Hosánna in excélsis.

Benedíctus qui venit in nómine Dómini. Hosánna in excélsis.

In EnglishHoly, Holy, Holy, Lord God of Hosts. Heaven and earth are full of thy glory. Hosanna in the highest. Blessed is he who comes in the name of the Lord. Hosanna in the highest.

Grammar notes

  • Sábaotha Hebrew word meaning “hosts” or “armies,” left untranslated. The whole phrase Dóminus Deus Sábaoth means “Lord God of Hosts” — Sábaoth modifies the pair Dóminus Deus
  • Pleni sunt caeli et terra“Heaven and earth are full” — pleni is the nominative plural of plenus, agreeing with caeli et terra
  • glória tuaablative of glória: full of thy glory, an ablative of respect
  • Benedíctus qui venit“Blessed is he who comes” — qui is the relative pronoun, nominative masculine singular
  • in nómine Dóminiin the name of the Lord — nómine = ablative of nomen; Dómini = genitive of Dóminus
  • Hosánnaa Hebrew exclamation of praise

Prayer 10

The Agnus Dei

Agnus Dei, qui tollis peccáta mundi, miserére nobis.

Agnus Dei, qui tollis peccáta mundi, miserére nobis.

Agnus Dei, qui tollis peccáta mundi, dona nobis pacem.

In EnglishLamb of God, who takest away the sins of the world, have mercy on us. … Lamb of God, who takest away the sins of the world, grant us peace.

Grammar notes

  • Agnus DeiLamb of God — Agnus is nominative, the subject in address; Dei is genitive, “of God”
  • qui tollis“who takest away” — qui is the relative pronoun; tollis is second singular present of tóllere, to lift up or take away
  • peccáta mundi“the sins of the world” — peccáta = accusative plural; mundi = genitive of mundus
  • miserérehave mercy — imperative of miseréri, a deponent verb
  • donagrant — imperative of donáre
  • nobisto us — dative
  • pacempeace — accusative of pax, the object of dona

Prayer 11

The Salve Regina

Hail, Holy Queen

Salve, Regína, Mater misericórdiae, vita, dulcédo et spes nostra, salve.

Ad te clamámus, éxsules fílii Hevae. Ad te suspirámus, geméntes et flentes in hac lacrimárum valle.

Eia ergo, advocáta nostra, illos tuos misericórdes óculos ad nos convérte. Et Iesum, benedíctum fructum ventris tui, nobis post hoc exsílium osténde.

O clemens, o pia, o dulcis Virgo María.

In EnglishHail, Holy Queen, Mother of Mercy, our life, our sweetness and our hope. To thee do we cry, poor banished children of Eve. To thee do we send up our sighs, mourning and weeping in this valley of tears. Turn then, most gracious advocate, thine eyes of mercy toward us. And after this our exile, show unto us the blessed fruit of thy womb, Jesus. O clement, O loving, O sweet Virgin Mary.

Selected grammar

  • SalveHail — imperative of salvére, to be well
  • RegínaO Queen — vocative, which for a first-declension feminine noun is the same as the nominative
  • Mater misericórdiaeMother of mercy — misericórdiae is genitive
  • Ad te clamámus“To thee we cry out” — ad te, accusative after ad
  • éxsulesexiles — nominative plural of éxsul (3rd decl.)
  • fílii Hevaechildren of Eve — fílii nominative plural; Hevae genitive
  • in hac lacrimárum vallein this valley of tears — hac … valle ablative after in; lacrimárum genitive plural, “of tears”
  • advocáta nostraour advocate — vocative again
  • osténdeshow — imperative of osténdere

Prayer 12

Sub Tuum Praesídium

We fly to thy protection

The oldest known prayer to the Blessed Virgin — the Greek original dates to the third century. It is short enough to memorize in a single sitting, and it is the example quoted in Lesson 9 for sub + accusative.

Sub tuum praesídium confúgimus, sancta Dei Génetrix.

Nostras deprecatiónes ne despícias in necessitátibus nostris, sed a perículis cunctis líbera nos semper, Virgo gloriósa et benedícta.

In EnglishWe fly to thy protection, O holy Mother of God. Despise not our petitions in our necessities, but deliver us always from all dangers, O glorious and blessed Virgin.

Selected grammar

  • Sub tuum praesídiumunder thy protection — sub + accusative, motion toward: “we flee under”; tuum praesídium is accusative neuter
  • confúgimuswe flee for refuge — first plural present of confúgere
  • sancta Dei GénetrixO holy Mother of God — vocative; Génetrix = “she who begets”; Dei genitive
  • nostras deprecatiónesour petitions — accusative plural, the object of despícias
  • ne despíciasdo not despise — ne + subjunctive, a negative command
  • in necessitátibus nostrisin our necessities — ablative plural after in
  • a perículis cunctisfrom all dangers — a + ablative; cunctis = all
  • líbera nosdeliver us — imperative of liberáre with the accusative nos
  • Virgo gloriósa et benedíctaO glorious and blessed Virgin — vocative

Prayer 13

Anima Christi

Soul of Christ

Anima Christi, sanctífica me. Corpus Christi, salva me.

Sanguis Christi, inébria me. Aqua láteris Christi, lava me.

Passio Christi, confórta me. O bone Iesu, exáudi me.

Intra tua vulnera abscónde me. Ne permíttas me separári a te.

In EnglishSoul of Christ, sanctify me. Body of Christ, save me. Blood of Christ, inebriate me. Water from the side of Christ, wash me. Passion of Christ, strengthen me. O Good Jesus, hear me. Within thy wounds hide me. Suffer me not to be separated from thee.

Grammar notes

  • Anima, Corpus, Sanguis, Aqua, Passioall nominative — the subjects of invocation
  • Christiof Christ — the genitive of Christus, throughout
  • sanctífica, salva, lava, confórta, exáudi, abscóndeall imperatives: commands, which in prayer are petitions
  • meme — accusative, the object of every one of those imperatives
  • O bone IesuO good Jesus — vocative; bone is the vocative of bonus, Iesu of Iesus
  • Intra tua vulnerawithin thy wounds — intra + accusative
  • ne permíttas … separári“do not allow … to be separated” — ne + subjunctive; separári is a passive infinitive

Prayer 14

De Profúndis

Psalm 130 — Vulgate 129

De profúndis clamávi ad te, Dómine. Dómine, exáudi vocem meam. Fiant aures tuae inténdentes in vocem deprecatiónis meae.

Si iniquitátes observáveris, Dómine, Dómine, quis sustinébit? Quia apud te propitiátio est, et propter legem tuam sustínui te, Dómine.

Sperávit ánima mea in Dómino. A custódia matutína usque ad noctem, speret Israël in Dómino. Quia apud Dóminum misericórdia, et copiósa apud eum redémptio. Et ipse rédimet Israël ex ómnibus iniquitátibus eius.

In EnglishOut of the depths I have cried to thee, O Lord. Lord, hear my voice. Let thine ears be attentive to the voice of my supplication. If thou, O Lord, wilt mark iniquities — Lord, who shall stand? For with thee there is forgiveness, and by reason of thy law I have waited for thee, O Lord. … For with the Lord there is mercy, and with him plentiful redemption. And he shall redeem Israel from all his iniquities.

Part IV

Vocabulary Lists

A little over a hundred words. They are not chosen for frequency in Cicero but for frequency in the Missal, the Rosary, and the Breviary.

List 1

The Holy Trinity and Christ

Deus
God
Dóminus
Lord
Pater
Father
Fílius
Son
Spíritus Sanctus
Holy Spirit
Trínitas
Trinity
Christus
Christ — the Anointed One
Iesus
Jesus
Verbum
the Word
Unigénitus
Only-Begotten
Rex
King
Agnus
Lamb
Salvátor
Saviour
Redémptor
Redeemer
Mediátor
Mediator
Pontífex
High Priest
Lux mundi
Light of the world
Víta
Life
Véritas
Truth
Via
Way
Pastor
Shepherd
Panis vitae
Bread of life

List 2

The Blessed Virgin Mary

María
Mary
Virgo
Virgin
Mater Dei
Mother of God
Theotókos
God-bearer — Greek, used in theology
Regína Caeli
Queen of Heaven
Immaculáta
the Immaculate One
Cor Immaculátum
Immaculate Heart
cor = heart, neuter; the full title is Cor Immaculátum Beátae Maríae Vírginis
Assúmpta
the Assumed — taken up into Heaven
Advocáta nostra
Our Advocate
Stella Maris
Star of the Sea
Rosa Mystica
Mystical Rose
Porta Caeli
Gate of Heaven
Auxílium Christianórum
Help of Christians

List 3

The Church and the Sacraments

Ecclésia
Church
cathólica
catholic — universal
apostólica
apostolic
sacraméntum
sacrament
baptísma
Baptism
Eucharistía
Eucharist
Confirmátio
Confirmation
Paeniténtia
Penance
Matrimónium
Matrimony
Ordo
Holy Orders
Unctio
Anointing
Missa
Mass
sacrifícium
sacrifice
oblátio
offering
altáre
altar
calix
chalice
calicis in the genitive — note the i, not a y; calyx with a y is the cup of a flower
patena
paten
tabernáculum
tabernacle
sanctuárium
sanctuary
sacérdos
priest
epíscopus
bishop
póntifex
pope, high priest
díaconus
deacon
lector
reader
cantor
singer, chanter
cómmunio
Communion
conféssio
confession
absolútio
absolution
indulgéntia
indulgence

List 4

The Liturgical Year

Advéntus
Advent
Natívitas
Nativity, Christmas
Epiphánia
Epiphany
Quadragésima
Lent — the forty days
Féria
weekday
Domínica
Sunday — the Lord’s Day
Sábbatum
Saturday
Cena Dómini
Holy Thursday — the Lord’s Supper
Parascéve
Good Friday — the Preparation
Vígilia Paschális
the Easter Vigil
Pascha
Easter
Ascénsio
Ascension
Pentecóstes
Pentecost
Corpus Christi
Body of Christ — the feast
festum
feast
vigília
vigil
octáva
octave — eight days

List 5

Virtues, States of Soul, and Theological Terms

fides
faith
spes
hope
cáritas
charity, love
prudéntia
prudence
iustítia
justice
fortitúdo
fortitude
temperántia
temperance
humílitas
humility
obediéntia
obedience
patiéntia
patience
pax
peace
grátia
grace
misericórdia
mercy
salus
salvation, health
glória
glory
peccátum
sin
culpa
fault, guilt
paeniténtia
penance, repentance
convérsio
conversion, a turning
sanctificátio
sanctification
revelátio
revelation
redémptio
redemption
resurréctio
resurrection
vita aetérna
eternal life
Part V

Reading Exercises

Nothing here is new. Everything is an application of Parts I to IV — try each one before you open the answer.

Exercise 1

From the Vulgate

Identify the case and the meaning of each word before you open the parsing.

John 1:1

In princípio erat Verbum, et Verbum erat apud Deum, et Deus erat Verbum.

“In the beginning was the Word, and the Word was with God, and the Word was God.”

Parse it
  • princípioablative of princípium, after in — place
  • Verbumnominative: the subject in the first clause, then nominative again as the predicate
  • apud Deumnear or with God — apud + accusative
  • Deusnominative, the predicate: “the Word was God”

John 3:16

Sic enim Deus diléxit mundum ut Fílium suum unigénitum daret.

“For God so loved the world that he gave his only-begotten Son.”

Parse it
  • Deusnominative — the subject
  • diléxitperfect of dilígere — “he loved”
  • mundumaccusative of mundus — the direct object of diléxit
  • Fílium … unigénitumaccusative — the object of daret
  • suumhis own — a reflexive possessive adjective
  • daretimperfect subjunctive of dare, after ut, expressing purpose or result

Matthew 5:3

Beáti páuperes spíritu, quóniam ipsórum est regnum caelórum.

“Blessed are the poor in spirit, for theirs is the kingdom of heaven.”

Parse it
  • Beátinominative plural of beátus — a predicate adjective
  • páuperesnominative plural of pauper — the subject
  • spírituablative of spíritus — an ablative of respect: poor in spirit
  • ipsórumgenitive plural of ipse: “of them, theirs”
  • estis — third singular of esse
  • regnum caelórumnominative, the subject of est; caelórum is genitive plural

Exercise 2

Mass Phrases — Parse Before You Translate

For each phrase, name what every word means and what its case is doing. Then open the answer.

At the greeting

Dóminus vobíscum

“The Lord be with you.”

Parse it
  • Dóminusthe Lord — nominative, the subject
  • vobíscumwith you, plural — cum + the ablative of vos, suffixed

At the Agnus Dei

dona nobis pacem

“Give us peace.”

Parse it
  • donagive — imperative of donáre
  • nobisto us — dative
  • pacempeace — accusative, the direct object

At Communion

Corpus Christi

“The Body of Christ.”

Parse it
  • Corpusbody — nominative
  • Christiof Christ — genitive

At a Requiem

Réquiem aetérnam dona eis, Dómine

“Grant them eternal rest, O Lord.”

Parse it
  • Réquiemrest — accusative
  • aetérnameternal — accusative, agreeing with réquiem
  • donagive — imperative
  • eisto them — dative
  • DómineO Lord — vocative

Before Communion

Ecce Agnus Dei, qui tollit peccáta mundi

“Behold the Lamb of God, who takes away the sins of the world.”

Parse it
  • EcceBehold
  • Agnus DeiLamb of God — nominative and genitive
  • quiwho — the relative pronoun, nominative
  • tollittakes away — third singular present
  • peccátasins — accusative plural
  • mundiof the world — genitive

Exercise 3

Translate These Sentences

Work through all ten, then check your answers together.

  1. Deus lux est.1 John 1:5
  2. Credo in unum Deum.
  3. Sanctus est Dóminus.
  4. Veníte, adorémus Dóminum.
  5. Miserére mei, Deus.Psalm 51:1
  6. Glória Patri et Fílio et Spirítui Sancto.
  7. Ecce ancilla Dómini.Luke 1:38
  8. Fiat mihi secúndum verbum tuum.Luke 1:38
  9. Ite, missa est.
  10. Ora pro nobis, Sancta Dei Génetrix.
Show the answers
  1. Deus lux est.God is light.
  2. Credo in unum Deum.I believe in one God.
  3. Sanctus est Dóminus.The Lord is holy.
  4. Veníte, adorémus Dóminum.Come, let us adore the Lord.
  5. Miserére mei, Deus.Have mercy on me, O God.
  6. Glória Patri et Fílio et Spirítui Sancto.Glory to the Father and to the Son and to the Holy Spirit.
  7. Ecce ancilla Dómini.Behold the handmaid of the Lord — Mary’s words to the angel.
  8. Fiat mihi secúndum verbum tuum.Be it done unto me according to thy word — Mary’s fiat.
  9. Ite, missa est.Go, the Mass is ended.
  10. Ora pro nobis, Sancta Dei Génetrix.Pray for us, O Holy Mother of God.
Part VI

Quick Reference

Three tables to come back to. When a form stops you mid-prayer, it is almost always in one of them.

Table 1

The Cases at a Glance

CaseThe question it answersTypical use
NominativeWho or what does the action?Subject
GenitiveWhose? Of what?Possession; “of”
DativeTo whom? For whom?Indirect object
AccusativeWhom or what receives the action?Direct object; after ad, in (motion), per, propter, ante, post
AblativeBy, with, from, in, at?Many uses; with in (rest), cum, de, ex, a / ab, sine, sub, pro
VocativeWho is being addressed?Direct address — Dómine!

Table 2

Essential Verb Forms

LatinFormMeaning
sum1st sg. presentI am
est3rd sg. presenthe, she, it is
sumus1st pl. presentwe are
fuit3rd sg. perfecthe, she was
erat3rd sg. imperfecthe, she, it was — ongoing
erit3rd sg. futurehe, she will be
credo1st sg. presentI believe
laudámus1st pl. presentwe praise
venit3rd sg. present or perfecthe comes; he came
fiat3rd sg. subjunctivelet it be done
donaimperativegive!
oraimperativepray!
veniimperativecome!
miseréreimperativehave mercy!

Table 3

Numbers

unus, una, unum
one
duo, duae, duo
two
tres, tria
three
quattuor
four
quinque
five
sex
six
septem
seven
octo
eight
novem
nine
decem
ten
centum
one hundred
mille
one thousand
primus / a / um
first
secundus / a / um
second
tertius / a / um
third
Part VII

Flashcards

Everything above, turned into cards. The decks are drawn from the tables and vocabulary lists of this primer itself, so nothing here is new to you — it is the same material, asking instead of telling.

Drill

Learn the Cards by Heart

Pick a deck. A card shows its Latin; call the meaning to mind, then turn it over. Got it retires the card, Again sends it to the back of the pile — a deck is not finished until every card has been answered rightly once. English first reverses the drill, which is harder and worth doing second.

Ten minutes a day will do more than an hour on Saturday. The decks you have cleared are marked, so you can begin again where you left off.

The flashcards need JavaScript. Without it, the tables in Parts I, II, IV and VI hold the same words — cover the right-hand column with your thumb and you have the same drill.

Part VIII

Next Steps

You now have a foundation. Six ways to build on it — none of them requiring a classroom.

Going further

Continuing Your Study

  1. Attend the Traditional Latin Mass with a missal

    There is no better classroom. Follow the text in a hand missal — the 1962 Roman Missal, or any traditional hand missal with facing-page translations. After a few weeks you will begin to anticipate the words before your eye reaches the English column.

  2. Pray the Divine Office in Latin

    Begin with Compline, the Church’s night prayer. It is brief and draws on the same few psalms daily, so the vocabulary repeats until it sticks. The Salve Regina closes Compline — and you already know it.

  3. Memorize one new prayer a week

    Start with Sub Tuum Praesídium, the Anima Christi, the opening of the Te Deum, and De Profúndis. Each one teaches new vocabulary organically, in the only context that makes words stay: prayer you mean.

  4. Work through a grammar

    A primer gets you to the door. A grammar takes you through it.

    • Wheelock’s LatinThe standard university grammar — secular, but rigorous.
    • Henle LatinA Jesuit grammar designed for Catholic students. Highly recommended.
    • Latin for CatholicsPrimers written specifically for the liturgy.
    • The Ordinary of the MassIn any hand missal — your primary textbook.
    • Divinum Officiumdivinumofficium.com — the Latin Divine Office, free and complete.
    • Vox Clara / Latin Mass MagazineCommentary on liturgical Latin.
  5. Learn the Psalms

    The Psalms are the backbone of Catholic prayer. Begin with Psalms 1, 23 (Dóminus regit me — “The Lord is my shepherd”), 51 (Miserére), 130 (De Profúndis), and 150 (Laudáte Dóminum). Remember that traditional Latin psalters number these from the Greek Septuagint, so Dóminus regit me is Psalm 22 in a Vulgate psalter and 23 in a modern Bible; likewise Miserére is 50 or 51, and De Profúndis 129 or 130. The Latin stands closer to Hebrew poetry than most modern translations, and vocabulary accumulates quickly.

  6. Read the Vulgate

    St Jerome’s Latin Bible — the Biblia Sacra Vulgáta of the fourth century — is the Church’s own Scripture text. Begin with the Gospel of St John, the Evangélium Secúndum Ioánnem: the vocabulary is simple and the theology is not. In princípio erat Verbum…

A closing note

Ecclesiastical Latin and the Soul

Learning Latin is not merely an intellectual exercise. When you pray Pater noster, qui es in caelis with understanding, you do not simply translate — you participate. The words were on the lips of St Thomas Aquinas, St Catherine of Siena, St Francis of Assisi, and countless anonymous souls who knelt before the same altar and addressed the same God in the same words.

Latin is continuity. It is the thread running through two thousand years of Catholic prayer, theology, and martyrdom. As Pope John XXIII wrote, it is “a most effective bond, binding the Church of today with that of the past and of the future in wonderful continuity.”

Every word you learn draws you further into that continuity — into the communio sanctórum, the communion of saints, who have praised God in these words before you, and will do so long after.

Deo grátias. ✠

This primer was prepared for Catholic learners desiring to pray, worship, and study in the language of the Church. It draws upon the Vulgate, the Roman Missal, papal documents, and the Church’s two-thousand-year tradition of sacred Latin.

On why the Church keeps this language at all, see Why Speak a Dead Language?

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