- Afrikaans: 'n
- Arabic: not used
- Aragonese: un m., una f.
- Breton: un (before the letters n, d, t and h); ul (before the letter l); ur (before other letters)
- Catalan: un m., una f.
- Chinese: 一 (yī), 一个 (yīge)
- Cornish: not used
- Czech: not used
- Danish: en da(da) c., et da(da) n.
- Dutch: een nl(nl)
- Esperanto: not translated
- Fijian: e dua na
- Finnish: not used
- French: un fr(fr) m., une fr(fr) f.
- Galician: um m., umha f.
- Georgian: not used
- German: ein de(de) m., eine de(de) f., ein de(de) n.
- Greek: ένας el(el) (énas)
- Hebrew: not used
- Hindi: एक hi(hi)
- Huave: nop
- Hungarian: egy hu(hu)
- Interlingua: un
- Irish: not used
- Italian: un m., uno m., una f., un' f. before a vowel
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- Japanese: not used
- Kannada: ಒಂದು
- Korean: not used
- Kurdish: yek ku(ku), -ek ku(ku), -yek ku(ku)
- Latin: not used
- Lithuanian: not used
- Manx: not used
- Norwegian: en no(no) m., ei no(no) f., et no(no) n.
- Novial: usually not used, otherwise un
- Polish: not used
- Portuguese: um pt(pt) m., uma pt(pt) f.
- Romanian: un ro(ro) m., o ro(ro) f.
- Russian: not used
- Scottish Gaelic: not used
- Slovak: not used
- Spanish: un es(es) m., una es(es) f.
- Swedish: en sv(sv) c., ett sv(sv) n.
- Telugu: ఒక
- Thai: หนึ่ง (nèùng)
- Turkish: bir
- Tz'utujil: jun
- Vietnamese: cái (for inanimate objects), con (for animals, people, etc.), cuốn (for books, etc.), người (for people), quả (for fruit')
- Võro: not used
- West Frisian: in
- Yiddish: אַ yi(yi), אַן yi(yi)
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