Afrikaans: negentien (af) , neëntien
Albanian: nëntëmbëdhjetë (sq)
American Sign Language:
Amharic: አስራ ዘጠኝ ( ʾäsra zäṭäñ )
Apache:
Western Apache: ńgóstʼáítsʼádah
Arabic: تِسْعَةَ عَشَرَ ( tisʕata ʕašara )
Egyptian Arabic: تسعتاشر ( tisʕatāšar )
Aramaic:
Hebrew: תשעסר m ( tsha‘sar ) , תשעסרא f ( tsha‘esrē )
Syriac: ܬܫܥܣܪ m ( tsha‘sar ) , ܬܫܥܣܪܐ f ( tsha'esrē )
Armenian: տասնինը (hy) ( tasninə )
Old Armenian: իննեւտասն ( innewtasn )
Asturian: diecinueve (ast)
Aymara: tunka llätunkani
Azerbaijani: on doqquz (az)
Bashkir: ун туғыҙ ( un tuğıź )
Basque: hemeretzi (eu)
Belarusian: дзевятна́ццаць (be) ( dzjevjatnáccacʹ )
Bengali: উনিশ (bn) ( uniś ) (numeral: ১৯ )
Bikol Central: kagsiyam
Breton: naontek (br)
Brunei Malay: sambilan balas
Bulgarian: деветна́десет ( devetnádeset ) , деветна́йсет ( devetnájset )
Burmese: ဆယ့်ကိုး ( hcai.kui: ) (numeral: ၁၉ )
Buryat: арбан юһэн ( arban juhen )
Carpathian Rusyn: девятна́дцять ( devjatnádcjatʹ )
Catalan: dinou (ca)
Cebuano: napulog siyam
Central Sierra Miwok: naˀá·ča- woˀé-ˀ hej·i-ˀ
Chechen: ткъайоьсна ( tqʼajösna )
Cherokee: ᏐᏁᎳᏚ ( soneladu )
Chichewa: khumi n'zisanu n'zinayi
Chickasaw: awa-chakká'li
Chinese:
Cantonese: 十九 ( sap6 gau2 )
Hakka: 十九 ( sṳ̍p-kiú )
Mandarin: 十九 (zh) ( shíjiǔ )
Chuvash: вунтӑххӑр ( vunt̬ăhhăr ) , вунтăххăр ( vuntăhhăr ) , вунтăхăр ( vuntăhăr )
Classical Nahuatl: caxtōlli onnāhui
Czech: devatenáct (cs)
Dalmatian: dichinú
Danish: nitten (da)
Dena'ina: łq'ich'idi beq'di
Dhivehi: ނަވާރަ ( navāra ) , އޮނަވިހި ( onavihi )
Dutch: negentien (nl) f
Dzongkha: བཅུ་དགུ ( bcu dgu )
Esperanto: dek naŭ
Estonian: üheksateist (et)
Fijian: tini ka ciwa
Finnish: yhdeksäntoista (fi)
French: dix-neuf (fr) m
Galician: dezanove (gl)
Georgian: ცხრამეტი (ka) ( cxrameṭi )
German: neunzehn (de)
Greek: δεκαεννέα (el) ( dekaennéa ) , δεκαεννιά (el) ( dekaenniá )
Ancient: ἐννεακαίδεκα ( enneakaídeka ) , ιθ΄ ( numeral )
Greenlandic: arfersaneq-sisamat (kl)
Haitian Creole: diznèf
Hawaiian: ʻumikūmāiwa
Hebrew: תְּשַׁע־עֶשְׂרֵה f ( t'sha esre ) ( used in counting ) , תִּשְׁעָה־עָשָׂר m ( tish'a asar )
Hindi: उन्नीस (hi) ( unnīs )
Hopi: pakwt niikyang pevt siikya’ta
Hungarian: tizenkilenc (hu)
Hunsrik: neinzen
Icelandic: nítján (is)
Ido: dek-e-non (io)
Inari Sami: oovcenubáloh
Indonesian: sembilan belas (id)
Ingrian: yheksäntoist
Interlingua: dece-nove
Irish: naoi déag
Italian: diciannove (it)
Japanese: 十九 (ja) ( じゅうきゅう, jūkyū, じゅうく, jūku )
Javanese: sangalas
Kannada: ಹತ್ತೊಂಬತ್ತು (kn) ( hattombattu )
Kazakh: он тоғыз ( on toğyz )
Khmer: ដប់ប្រាំបួន ( dop pram buon ) (numeral: ១៩ )
Komi-Permyak: дасӧкмыс ( dasökmys )
Korean: 열아홉 (ko) ( yeorahop ) , 십구(十九) (ko) ( sipgu )
Kurdish:
Central Kurdish: نۆزدە ( nozde )
Northern Kurdish: nozde (ku)
Kyrgyz: он тогуз (ky) ( on toguz )
Ladin: please add this translation if you can
Lakota: akénapčiyuŋka
Lao: ສິບເກົ້າ ( sip kao ) (numeral: ໑໙ )
Latin: ūndēvīgintī (la)
Latvian: deviņpadsmit (lv)
Ligurian: dixinêuve
Lithuanian: devyniolika (lt)
Livonian: īdõkstuoistõn
Lombard: please add this translation if you can
Louisiana Creole French: diz-nèf
Low German: negenteihn (nds) , nägenteihn German Low German: negenteihn (nds)
Lü: ᦉᦲᧇᦂᧁᧉ ( ṡiibk̇aw² ) (numeral: ᧑᧙ )
Luxembourgish: nongzéng nonzéng (lb)
Macedonian: деветна́есет ( devetnáeset )
Malagasy: sivy ambinifolo
Malay: sembilan belas (ms) , sepuluh sembilan satu puluh sembilan
Malayalam: പത്തൊമ്പത് (ml) ( pattompatŭ )
Maltese: dsatax
Maori: tekau mā iwa (mi)
Mapudungun: mariylla
Middle English: nynetene
Mongolian: арван ес ( arvan jes ) , арав ес ( arav jes ) ( China )
Navajo: náhástʼéítsʼáadah
Norman: dix-neuf dgiêx-neuf
Northern Mansi: (please verify ) онтэлловхуйплов ( ontèllowhujplow )
Northern Sami: ovccinuppelohkái
Norwegian: nitten (no)
Occitan: dètz-e-nòu (oc)
Odia: ଉଣେଇଶ ( uṇeiśô ) (numeral: ୧୯ ( 19 ) )
Ojibwe: ashi-zhaangaswi
Old Church Slavonic: девѧть на десѧте ( devętĭ na desęte ) (numeral: ѳ҃і )
Pennsylvania German: neinzeh
Persian: نوزده (fa) ( nuzdah )
Piedmontese: disneuv
Polish: dziewiętnaście (pl) , ( collective ) dziewiętnaścioro (pl)
Portuguese: dezanove (pt) ( Portugal ) , dezenove (pt) ( Brazil )
Punjabi: ਉਨੀਂ ( unī̃ )
Quechua: chunka isqunniyuq
Romagnol: znov
Romani:
Kalo Finnish Romani: deȟ-o-enja
Romanian: nouăsprezece (ro) , nouășpe ( informal )
Romansch: ( Grischun ) deschnov
Russian: девятна́дцать (ru) ( devjatnádcatʹ )
S'gaw Karen: တဆံခွံ ( ta hsee khwee )
Samoan: sefulu iva
Sanskrit: ऊनविंशति (sa) ( ūnaviṃśáti ) , नवदशन् (sa) ( návadaśan )
Santali: ᱜᱮᱞ ᱟᱨᱮ ( gel are )
Scottish Gaelic: naoi deug
Serbo-Croatian:
Cyrillic: деветнаест
Roman: devetnaest
Shan: သိပ်းၵဝ်ႈ ( síp kāo )
Sinhalese: දහනවය ( dahanawaya )
Skolt Sami: åcmlo
Slovak: devätnásť (sk)
Slovene: devetnajst (sl)
Sorbian:
Lower Sorbian: źewjeśnasćo
Upper Sorbian: dźewjatnaće (hsb)
Spanish: diecinueve (es)
Swahili: kumi na tisa
Swedish: nitton (sv)
Tagalog: labinsiyam (tl)
Tahitian: hō'ē 'ahuru ma iva
Tajik: нуздаҳ (tg) ( nuzdah )
Tatar: унтугыз ( untuğız )
Telugu: పంతొమ్మిది (te) ( pantommidi )
Thai: สิบเก้า (th) ( sìp-gâao ) (numeral: ๑๙ )
Tibetan: བཅུ་དགུ ( bcu dgu )
Tigre: ዐስር ወስዕ ( ʿäsr wäsʿ )
Tigrinya: ዓሰርተ ትሽዓተ ( ʿasärtä təšʿatä )
Tok Pisin: naintin wanpela ten nain
Tongan: hongofulu mā hiva
Turkish: on dokuz (tr)
Turkmen: on dokuz (tk)
Ukrainian: дев’ятна́дцять (uk) ( devʺjatnádcjatʹ )
Urdu: انیس ( unnīs )
Uyghur: ئون توققۇز (ug) ( on toqquz )
Uzbek: oʻn toʻqqiz (uz)
Vietnamese: mười chín
Volapük: degzül balsezül ( older term, obsolete )
Welsh: pedwar ar bymtheg (cy) m ( vigesimal, traditional ) , pedair ar bymtheg (cy) f ( vigesimal, traditional ) , un deg naw (cy) ( decimal )
West Frisian: njoggentjin (fy)
Wolof: fukk ak juróom ñeent
Yakut: уон тоҕус ( uon toğus )
Yiddish: נײַנצן ( nayntsn )
Yup'ik: yuinaunritaraan yuinaunrita'ar
Zazaki: newês (diq) , desunew
Zhuang: cib gouj 
