- Afrikaans: soogdier (af)
- Albanian: gjitar (sq) m
- Arabic: ثَدْيِيّ m (ṯadyiyy)
- Armenian: կաթնասուն (hy) (katʿnasun)
- Assamese: স্তন্যপায়ী (stoinnopayi), স্তন্যপায়ী প্ৰাণী (stoinnopayi prani)
- Asturian: mamíferu (ast) m
- Azerbaijani: məməli
- Basque: ugaztun (eu)
- Belarusian: млекако́рмячае n (mljekakórmjačaje), сысу́н m (sysún), звер m (zvjer)
- Bengali: স্তন্যপায়ী (bn) (stonnopaẏi)
- Bulgarian: боза́йник (bg) m (bozájnik)
- Burmese: နို့တိုက်သတ္တဝါ (my) (nui.tuiksatta.wa)
- Catalan: mamífer (ca) m
- Chechen: декха дийнат (deqa diinat)
- Chinese:
- Mandarin: 哺乳類／哺乳类 (zh) (bǔrǔlèi), 哺乳動物／哺乳动物 (zh) (bǔrǔ dòngwù)
- Czech: savec (cs) m
- Danish: pattedyr (da) n
- Dutch: zoogdier (nl) n
- Esperanto: mamulo
- Estonian: imetaja
- Faroese: súgdjór (fo) n
- Finnish: nisäkäs (fi)
- French: mammifère (fr) m
- Galician: mamífero (gl) m
- Georgian: ძუძუმწოვარი (ʒuʒumc̣ovari)
- German: Säugetier (de) n
- Greek: θηλαστικό (el) n (thilastikó)
- Guaraní: okambúva (gn)
- Hebrew: יוֹנֵק (he) (yonék)
- Hindi: स्तनपायी (hi) m (stanpāyī), स्तनधारी (hi) m (standhārī)
- Hungarian: emlős (hu)
- Icelandic: spendýr (is) n
- Ido: mamifero (io)
- Indonesian: mamalia (id), hewan menyusui
- Interlingua: mammifero, mammal
- Inuktitut: ᒪᒻᒪᓛᑎᒃ (mammalaatik)
- Irish: mamach (ga) m
- Italian: mammifero (it) m
- Japanese: 哺乳類 (ja) (ほにゅうるい, honyūrui)
- Kannada: ಸಸ್ತನಿ (sastani)
- Kazakh: сүтқоректі (sütqorektı)
- Khmer: ថនិកសត្វ (thaʼnikaʼ sat)
- Korean: 포유류(哺乳類) (ko) (poyuryu)
- Kurdish:
- Northern Kurdish: şîrdar (ku), guhandar (ku)
- Kyrgyz: сүт эмүүчүл (süt emüüçül)
- Lao: ສັດລ້ຽງລູກດ້ວຍນົມ (lo) (sat līang lūk duāi nom)
- Latin: mammalis, mammalia
- Latvian: zīdītājs m
- Lithuanian: žinduolis (lt) m
- Low German:
- German Low German: Söögdeert n
- Luxembourgish: Mamendéier (lb) n
- Macedonian: цицач m (cicač)
- Malay: mamalia (ms)
- Malayalam: സസ്തനി (sastani)
- Maori: kararehe whāngote
- Mongolian: хөхтөн (mn) (xöxtön)
- Norwegian:
- Bokmål: pattedyr (no) n
- Nynorsk: pattedyr n
- Occitan: mamifèr (oc) m
- Persian: پستاندار (fa) (pestândâr)
- Plautdietsch: Sutia n
- Polish: ssak (pl) m anim
- Portuguese: mamífero (pt) m
- Punjabi: ਥਣਧਾਰੀ m (thaṇdhārī)
- Romanian: mamifer (ro) n
- Russian: млекопита́ющее (ru) n (mlekopitájuščeje), зверь (ru) m (zverʹ)
- Serbo-Croatian:
- Cyrillic: сисар m, сисавац m
- Roman: sisar (sh) m, sisavac (sh) m
- Silesian: cyckocz m
- Sinhalese: ක්ෂීරපායීන් (kṣīrapāyīn)
- Slovak: cicavec (sk) m
- Slovene: sesalec (sl) m
- Spanish: mamífero (es) m
- Swedish: däggdjur (sv) n
- Tagalog: wilik, mamipero, mamalya (tl)
- Tajik: ширхӯр (tg) (širxür)
- Tatar: имезүче (tt) (imezüçe)
- Telugu: క్షీరదం (te) (kṣīradaṁ)
- Thai: สัตว์เลี้ยงลูกด้วยน้ำนม (th) (sàt-líiang-lûuk-dûai-náam-nom), สัตว์กินนม (sàt-gin-nom)
- Tupinambá: okambúba'e
- Turkish: memeli (tr), memeli hayvan (tr)
- Turkmen: süýdemdiriji
- Ukrainian: ссаве́ць m (ssavécʹ), звір (uk) m (zvir)
- Urdu: ستنپایی (satnapāyī)
- Uzbek: sut emizuvchil
- Vietnamese: động vật có vú, (informal) thú (vi) (獸)
- Volapük: (♂♀) sügaf (vo), (♂♀) süganim (vo)
- Welsh: mamal (cy) m
- West Frisian: sûchdier n
- Yiddish: זויגער m (zoyger)
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