- Albanian: idiot (sq) m
- Arabic: أَحْمَق m (ʔaḥmaq), غَبِيّ m (ḡabiyy), مُغَفَّل m (muḡaffal)
- Hijazi Arabic: غَبي m (ḡabi), أهْبَل m (ʔahbal), ْأبْلَه m (ʔablah), سَبَك m (sabak)
- Armenian: ապուշ (hy) (apuš), հիմար (hy) (himar), էշ (hy) (ēš)
- Azerbaijani: idiot (az), axmaq (az)
- Basque: ergel
- Belarusian: ду́рань m (dúranʹ), ідыёт m (idyjót), ідыётка f (idyjótka)
- Bengali: মূর্খ (bn) (murkho), বেক্কল (bekkol)
- Bikol Central: dangag (bcl), patal (bcl)
- Bulgarian: идио́т (bg) m (idiót), абда́л (bg) m (abdál), идио́тка f (idiótka), ахма́к (bg) m (ahmák), глупа́к (bg) m (glupák), глупа́чка f (glupáčka)
- Burmese: ဗာလ (my) (bala.)
- Catalan: idiota (ca) m or f
- Chichewa: chitsiru
- Chinese:
- Cantonese: 死蠢 (sei2 ceon2), 白痴 (baak6 ci1), 戇鳩/戆鸠 (ngong6 gau1)
- Mandarin: 白痴 (zh) (báichī), 傻子 (zh) (shǎzi), 蠢貨/蠢货 (zh) (chǔnhuò), 傻瓜 (zh) (shǎguā), 笨蛋 (zh) (bèndàn), 蠢材 (zh) (chǔncái), 呆子 (zh) (dāizi)
- Czech: idiot (cs) m, idiotka f
- Danish: idiot (da) c, nar c, fjols n
- Dutch: idioot (nl) m
- Esperanto: idioto
- Estonian: idioot
- Finnish: idiootti (fi), hölmö (fi), pöljä (fi), törttö, typerys (fi), urpo (fi)
- French: idiot (fr) m, idiote (fr) f
- Galician: babeco (gl) m, parvo (gl) m, mascato m, babiolo (gl) m, doudo m, pallouco m, lores m, paspán (gl) m, alpabarda (gl) m, mouco (gl) m, marmeco m, láparo m, inteño m, miñoto m, bouto m, idiota m
- Georgian: იდიოტი (idioṭi)
- German: Idiot (de) m, Idiotin (de) f, Narr (de) m, Närrin (de) f
- Greek: βλάκας (el) m (vlákas), ηλίθιος (el) m (ilíthios)
- Ancient: βλάξ m (bláx)
- Hebrew: אִידְיוֹט (he) m (idyót), גולם \ גֹּלֶם (he) (gólem)
- Hindi: मूर्ख (hi) m (mūrkh), बुद्धू m (buddhū), उल्लू (hi) m (ullū), बेवक़ूफ़ m (bevqūf)
- Hungarian: idióta (hu), (colloquial) hülye (hu), (literary) félkegyelmű (hu)
- Icelandic: hálviti m, asni (is) m, grasasni (is) m, skynskiptingur m (obsolete)
- Indonesian: bodoh (id)
- Ingrian: durakka, vohma, hapalka, oolo, tuhkuri, tuhkapää, tuhkapussi, foofana, bolvana
- Irish: amadán, dúramán m
- Italian: idiota (it) m or f, squasimodeo m
- Japanese: 馬鹿 (ja) (ばか, baka), あほ (ja) (aho), 白痴 (ja) (はくち, hakuchi), 戯け者 (たわけもの, tawakemono, おどけもの, odokemono)
- Kazakh: ақымақ (aqymaq), идиот (idiot)
- Khmer: ល្ងីល្ងើ (km) (lngii lngəə)
- Korean: 백치(白癡)(白痴) (baekchi), 바보 (ko) (babo), 등신(等神) (ko) (deungsin), 멍청이 (ko) (meongcheong'i), 천치(天癡)(天痴) (ko) (cheonchi)
- Kyrgyz: акмак (ky) (akmak), идиот (ky) (idiot)
- Ladin: totl m, musciat
- Lao: ຄົນບັດຊົບ (khon bat sop), ຄົນໂງ່ (khon ngō), ໂງ່ (ngō)
- Latin: blennus m, idiota m, fungus m
- Latvian: idiots m, idiote f, muļķis (lv) m, muļķe f, duraks (lv) m
- Lithuanian: idiotas m
- Luhya: omsilu
- Macedonian: абдал m (abdal), идио́т m (idiót), идио́тка f (idiótka)
- Malay: bodoh (ms)
- Malayalam: കണ്ണാപ്പി (kaṇṇāppi), പൊട്ടൻ (poṭṭaṉ)
- Manx: thoot m
- Maori: hukehuke, heahea, rorirori, pōhauhau, hākawa
- Middle English: sot
- Mongolian:
- Cyrillic: эргүү тэнэг (ergüü teneg), зүүлэг (mn) (züüleg), тэнэг (mn) (teneg)
- Ngazidja Comorian: ɗaɓa class 5/6
- Norman: peûle m
- Norwegian:
- Bokmål: idiot (no) m, narr (no) m
- Nynorsk: idiot m
- Old English: unwita m
- Persian: احمق (fa) (ahmaq), کودن (fa) (kowdan), خنگ (fa) (xeng), ابله (fa) (ablah), کانا (fa) (kânâ)
- Plautdietsch: Eefelt m, Dommajon m
- Polish: idiota (pl) m, idiotka (pl) f, głupek (pl) m, głupiec (pl) m, dureń (pl) m
- Portuguese: idiota (pt) m or f
- Punjabi: ਮੂਰਖ (mūrakh)
- Romanian: idiot (ro) m, idioată (ro) f, idioți pl, idioate f pl
- Russian: идио́т (ru) m (idiót), идио́тка (ru) f (idiótka), дура́к (ru) m (durák), ду́ра (ru) f (dúra), ду́рень (ru) m (dúrenʹ), глупе́ц (ru) m (glupéc)
- Sanskrit: मूढ (sa) m (mūḍha), निर्बुद्धि (sa) m (nirbuddhi), मूर्ख (sa) m (mūrkha), जल (sa) m (jala)
- Scots: stookie
- Scottish Gaelic: amadan m, òinseach f, burraidh m
- Serbo-Croatian:
- Cyrillic: идѝот m, идѝоткиња f
- Roman: idìot (sh) m, idìotkinja (sh) f
- Slovak: idiot m, idiotka f
- Slovene: idiot m, tepec m
- Spanish: idiota (es) m or f
- Swahili: mjinga (sw), kichwamaji (sw)
- Swedish: idiot (sv) c, narr (sv) c
- Tagalog: bobo (tl), tanga, ungas
- Tajik: аблаҳ (tg) (ablah), аҳмақ (tg) (ahmaq)
- Tatar: ахмак (tt) (axmaq)
- Telugu: వెధవ (vedhava)
- Thai: คนโง่ (kon-ngôo), ไอ้งั่ง, คนโง่เง่า, คนบ้า, คนปัญญาอ่อน, โง่ (th) (ngôo), ควาย (th) (kwaai)
- Turkish: salak (tr), ahmak (tr), aptal (tr), geri zekâlı, bön (tr), avanak (tr), andaval (tr)
- Turkmen: akmak (tk)
- Ukrainian: ідіо́т m (idiót), ідіо́тка f (idiótka), ду́рень (uk) m (dúrenʹ), йо́лоп (uk) m (jólop)
- Urdu: مورکھ m (mūrkh), بیوقوف m (bēvaqūf), الو m (ullū), بدھو m (buddhū)
- Uyghur: ئەخمەق (exmeq)
- Uzbek: idiot, ahmoq (uz)
- Vietnamese: thằng ngốc, thằng ngu
- Volapük: (♂♀) diotan (vo), (♂) hidiotan, (♀) jidiotan
- Welsh: twpsyn m, ynfytyn (cy) m
- Yiddish: אידיאָט m (idyot)
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