- Albanian:perandor (sq) m
- Arabic:قَيْصَر m(qayṣar),إِمْبْرَاطُور m(ʔimbrāṭūr)
- Hijazi Arabic:إِمْبْراطور m(ʔimbrāṭōr)
- Armenian:կայսր (hy)(kaysr)
- Old Armenian:կայսր(kaysr),կեսար(kesar)
- Aromanian:ampirat m
- Asturian:emperador (ast) m
- Azerbaijani:imperator,padşah
- Basque:enperadorea
- Belarusian:імпера́тар m(impjerátar),цар m(car)(tsar)
- Bengali:সম্রাট (bn)(śomraṭ)
- Breton:impalaer (br)
- Bulgarian:импера́тор (bg) m(imperátor)
- Burmese:ဧကရာဇ် (my)(eka.raj)
- Catalan:emperador (ca) m
- Chinese:
- Cantonese:皇帝(wong4 dai3)
- Dungan:хуонди(huondi),хуоншон(huonšon)
- Mandarin:皇帝 (zh)(huángdì),帝王 (zh)(dìwáng),皇上 (zh),天皇 (zh)(tiānhuáng)(emperor of Japan)
- Coptic:ⲁⲩⲧⲟⲕⲣⲁⲧⲱⲣ m(autokratōr)
- Czech:císař (cs) m
- Old Czech:ciesař m
- Danish:kejser (da) c
- Dutch:keizer (nl) m
- Dzongkha:རྒྱལ་ཆེན(rgyal chen)
- Esperanto:imperiestro
- Estonian:keiser (et),imperaator
- Extremaduran:emperaol m
- Faroese:keisari (fo)
- Finnish:keisari (fi)
- French:empereur (fr) m
- Frisian:
- North Frisian:keiser
- Saterland Frisian:Kaiser
- West Frisian:keizer c
- Friulian:imperadôr m
- Galician:emperador (gl) m
- Georgian:იმპერატორი(imṗeraṭori)
- German:Kaiser (de) m,Imperator (de) m
- Greek:αυτοκράτορας (el) m(aftokrátoras)
- Ancient Greek:αὐτοκράτωρ m(autokrátōr),καῖσαρ m(kaîsar),αὐτάναξ m(autánax)
- Hebrew:קיסר \ קֵיסָר (he) m(kesár, keysár)
- Hindi:सम्राट m(samrāṭ),महाराजा m(mahārājā),चक्रवर्ती (hi) m(cakravartī),अधिराज (hi) m(adhirāj)
- Hungarian:császár (hu)
- Icelandic:keisari (is) m
- Ido:cezaro (io),imperiestro (io)
- Indonesian:kaisar (id),maharaja (id)
- Interlingua:imperator
- Irish:impire m
- Italian:imperatore (it) m
- Japanese:皇帝 (ja)(こうてい, kōtei)(emperor in general),帝王 (ja)(ていおう, teiō)(general term for emperor or monarch),天皇 (ja)(てんのう, tennō)(emperor of Japan),帝 (ja)(みかど, mikado)
- Kazakh:император(imperator),патша(patşa)
- Khmer:អធិរាជ (km)(ʼaʼthiriəc),រាជាធិរាជ(riəciəthiriəc),សម្រាជ (km)(sɑmraac)
- Korean:황제(皇帝) (ko)(hwangje),천황(天皇) (ko)(cheonhwang)(emperor of Japan),제왕(帝王) (ko)(jewang)
- Kurdish:
- Northern Kurdish:padşeh (ku),şehanşeh
- Kyrgyz:император (ky)(imperator),падыша (ky)(padışa)
- Lao:ຈັກກະພັດ(chak ka phat),ຈັກກະວັດ(chak ka wat),ນໍຣິນ(nǭ rin),ນໍລິນ(nǭ lin),ຣາເຊນ(rā sēn)
- Latin:imperātor (la) m,autocratōr m(Late Latin),basileus m(medieval)
- Latvian:imperators m,ķeizars m
- Ligurian:imperatô m
- Lithuanian:imperatorius m,ciesorius m
- Low German:
- German Low German:Kaiser
- Luxembourgish:Keeser m
- Macedonian:импера́тор m(imperátor),цар m(car)(tsar)
- Malay:kaisar,maharaja,khakan
- Malayalam:സാമ്രാട്ട്(sāmrāṭṭŭ),ചക്രവർത്തി (ml)(cakravaṟtti)
- Maltese:imperatur m
- Manchu:ᡥᡡᠸᠠᠩᡩᡳ(hūwangdi),ᡥᠠᠨ(han)
- Mandingo:
- Mandinka:mansa
- Manx:ard-ree m
- Māori:emepara,epara
- Marathi:सम्राट m(samrāṭ)
- Middle English:emperour,kayser
- Mongolian:ᠡᠵᠡᠨ
ᠬᠠᠭᠠᠨ(eǰen qaɣan),ᠬᠠᠭᠠᠨ(qaɣan),ᠬᠤᠸᠠᠩᠳᠢ(quwangdi)(of China)- Cyrillic:эзэн хаан(ezen xaan),хаан (mn)(xaan),хуанди (mn)(xuandi)(of China)
- Norman:empéreu m(Jersey)
- Norwegian:
- Bokmål:keiser (no) m
- Nynorsk:keisar m
- Occitan:emperador (oc) m
- Old Occitan:emperador
- Old English:cāsere m
- Pashto:امپراتور (ps) m(amparātur),کيسر m(kaysar),قيصر (ps) m(qaysar)
- Persian:اِمْپِراطور (fa)(emperâtur),اِمْپِراتور (fa)(emperâtur),قِیْصَر (fa)(qeysar),پادِشاه (fa)(pâdešâh),پادْشاه (fa)(pâdšâh)
- Polish:imperator (pl) m,cesarz (pl) m,car (pl) m,kajzer m,carz (pl) m
- Portuguese:imperador (pt) m
- Punjabi:ਸਮਰਾਟ (pa)(samrāṭ)
- Quechua:qhapaq
- Romanian:împărat (ro) m
- Romansh:imperatur m,imperataur m,imperatour m,caiser m
- Russian:импера́тор (ru) m(imperátor),царь (ru) m(carʹ)(tsar)
- Sanskrit:अधिराज (sa) m(adhirāja),सम्राज् (sa) m(samrāj),राजाधिराज (sa) m(rājādhirāja)
- Scottish Gaelic:ìmpire m
- Serbo-Croatian:
- Cyrillic:ца̏р m,импѐра̄тор m,це̏са̄р m
- Latin:cȁr (sh) m,impèrātor (sh) m,cȅsār (sh) m
- Sicilian:mpiraturi
- Silesian:cysŏrz
- Slovak:cisár (sk) m,cár (sk) m(of Russia, Bulgaria)
- Slovene:cêsar (sl) m,imperátor m
- Sorbian:
- Lower Sorbian:kejžor m
- Upper Sorbian:kejžor m
- Spanish:emperador (es) m
- Swahili:kaisari
- Swedish:kejsare (sv) c
- Tagalog:emperador (tl)
- Tajik:император(imperator),қайсар(qaysar),подшоҳ(podšoh),подишоҳ(podišoh)
- Tatar:патша (tt)(patşa)
- Telugu:చక్రవర్తి (te)(cakravarti)
- Thai:จักรพรรดิ (th)(jàk-grà-pát),ฮ่องเต้ (th)(hɔ̂ng-dtêe)(emperor of China)
- Turkish:imparator (tr),ilhan (tr)
- Turkmen:imperator,patyşa
- Ukrainian:імпера́тор (uk) m(imperátor),цар (uk) m(car)(tsar)
- Urdu:شَہنْشاہ m(śahanśāh),سَمْراٹ m(samrāṭ),قَیصَر m(qaisar)
- Uyghur:ئىمپېراتور(impërator),پادىشا(padisha)
- Uzbek:imperator (uz),qaysar (uz),podsho (uz)
- Venetan:inperadore m,inperador m
- Vietnamese:hoàng đế (vi),thiên hoàng(of Japan)
- Vilamovian:kazer m
- Walloon:impreur (wa) m
- Welsh:ymerawdwr m
- Yiddish:קייסער m(keyser),אימפּעראַטאָר m(imperator)
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