- Albanian: qyqe (sq) f
- Arabic: وَقْوَاق m (waqwāq)
- Armenian: կկու (hy) (kku)
- Asturian: cucu m
- Bashkir: кәкүк (käkük)
- Basque: kuku
- Belarusian: зязю́ля (zjazjúlja)
- Breton: koukoug (br)
- Bulgarian: ку̀кувица f (kùkuvica), кукувѝца f (kukuvìca)
- Catalan: cucut m
- Chechen: оттйокх (ottjoq)
- Chinese:
- Mandarin: 杜鵑 (zh), 杜鹃 (zh) (dùjuān), 布穀鳥 (zh), 布谷鸟 (zh) (bùgǔniǎo)
- Chukchi: ӄэӄӄуӄ (qėqquq), ӄэӄуӄ (qėquq), ӄэӄучьын (qėqučʹyn)
- Cornish: koukou f
- Czech: kukačka (cs) f
- Danish: gøg (da) c
- Dutch: koekoek (nl) m
- Esperanto: kukolo
- Estonian: kägu (et)
- Faroese: geykur m
- Finnish: käki (fi)
- French: coucou (fr) m
- Friulian: cuc, cuců, cucuc
- Galician: cuco m
- Georgian: გუგული (guguli)
- German: Kuckuck (de) m
- Greek: κούκος (el) (koúkos)
- Ancient Greek: κόκκυξ m (kókkux)
- Hebrew: קוּקִיָה f (kukiyá)
- Hindi: कोयल (hi) f (koyal), कोकिला (hi) m (kokilā)
- Hungarian: kakukk (hu)
- Icelandic: gaukur (is) m
- Ido: kukulo (io)
- Inari Sami: kiehâ
- Interlingua: cucu
- Irish: cuach f
- Italian: cuculo (it) m, cucù (it) m
- Japanese: 郭公 (ja) (かっこう, kakkō), カッコウ (kakkō)
- Karakalpak: a'tsho'k
- Kazakh: көкек (kk) (kökek)
- Khakas: кӧӧк (kӧӧk)
- Korean: 뻐꾸기 (ppeokkugi), 두견새 (dugyeonsae)
- Ladin: cuch
- Latgalian: dzagiuze
- Latin: cuculus m
- Latvian: dzeguze (lv) f
- Lithuanian: gegutė (lt) f
- Livonian: keg, kukūlind
- Low German: Kuukuuk (nds) m, kukuuk m
- Lower Sorbian: kukawa
- Lule Sami: giehka, ránatjalådde
- Luxembourgish: Guckuck m
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- Macedonian: кука́вица f (kukávica)
- Maltese: daqquqa kaħla f
- Manx: cooag f
- Maori: kokoea
- Norman: coucou m
- Norwegian:
- Bokmål: gjøk (no) m
- Nynorsk: gauk m
- Occitan: coguol (oc) m, coguou (oc) m, cocut (oc) m
- Old English: ġēac m
- Old Norse: gaukr m
- Persian: کوکو (fa) (kuku)
- Polish: kukułka (pl) f
- Portuguese: cuco (pt) m
- Romani: kukuriezo m, chuhuriezo m, kukuriashka f, chuhuriashka f
- Romanian: cuc (ro)
- Romansch: cucu
- Russian: куку́шка (ru) f (kukúška)
- Sami: giehka
- Sardinian: cucu, cucui, cucuperra, cucuperrai, cucuevvai, cucumarei
- Scottish Gaelic: cuthag f, cuach f
- Serbo-Croatian:
- Cyrillic: кукавица f
- Roman: kukavica (sh) f
- Shor: кӧӧк (köök)
- Skolt Sami: ǩiõkk
- Slovak: kukučka (sk) f
- Slovene: kukavica (sl) f
- Southern Sami: gïege
- Spanish: cuco (es) m, cuclillo (es) m
- Swahili: kekeo
- Swedish: gök (sv) c
- Tagalog: kakok
- Tajik: фохтак (foxtak), куку (kuku), олучахӯрак (olučaxürak)
- Tamil: குயில் (ta) (kuyil)
- Telugu: కోకిల (te) (kōkila)
- Turkish: guguk (tr)
- Turkmen: ikatäk
- Ukrainian: зозу́ля f (zozúlja)
- Upper Sorbian: kokula
- Urdu: کویل f (koyal)
- Uzbek: kakkuqush, kakku (uz)
- Veps: kägi
- Vietnamese: chim cu, họ cu cu
- Volapük: kukuk (vo)
- Võro: kägo
- Walloon: coucou (wa) m
- Welsh: cog, cogau f pl, cwcw f
- West Frisian: koekoek (fy)
- Westrobothnian: gauk m, guku m
- Yakut: кэҕэ (keğe)
- Yiddish: קוקו (kuku)
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