- Abkhaz:-циа(-cja)
- Afrikaans:-sie
- Aragonese:-ción f
- Armenian:-ություն(-utʻyun),-ցիա(-cʻia)
- Aromanian:-tsie f
- Azerbaijani:-siya,-ţiya(South Azerbaijani),-mə,-ləşmə
- Basque:-zio (eu)
- Belarusian:-цыя(-cyja)
- Bulgarian:-ция(-cija)
- Catalan:-ció (ca) f (always forms a feminine noun)
- Crimean Tatar:-tsiya
- Czech:-ce
- Danish:-tion c
- Dutch:-ing (nl)(Germanic),-tie (nl)(Romanic)
- Esperanto:-ado (eo)
- Estonian:-tsioon
- Faroese:-sjón f
- Finnish:-minen (fi),-tio
- French:-tion (fr)
- Gagauz:-ţiya
- Galician:-ción (gl) f,-ção,-çom(reintegrationist)
- Georgian:-ცია(-cia)
- German:-ung (de) f(Germanic),-tion (de) f(Latin; Romanic)
- Greenlandic:-neq
- Haitian Creole:-syon
- Hebrew:־ציה f(tsya)
- Hindi:-शन(-śan)(used for borrowed words, like in "स्टेशन", etc.)
- Hungarian:-ció (hu)
- Indonesian:-si
- Italian:-zione(unless previous letter was "s", when "z" becomes "t", like in "digestione", "questione", etc.)
- Japanese:-化(-か, -ka),-ション(-shon)(used for certain borrowed words, like in "コミュニケーション", etc.)
- Kazakh:-ция(-siä)
- Khmer:ការ (km)(kaa)
- Korean:-션(-syeon)(used for borrowed words, like in "커뮤니케이션", etc.)
- Kyrgyz:-ция(-tsiya)
- Ladino:-syon
- Lai:-nak-cio
- Latgalian:-ceja
- Latin:-tiō f
- Latvian:-cija
- Lithuanian:-cija f
- Luxembourgish:-tioun f
- Macedonian:-ција(-cija)
- Malay:-si,-syen,-sen,peng--an,per--an
- Maltese:-zzjoni f
- Norwegian:-sjon (no) m
- Occitan:-cion f
- Old English:-ing f
- Polish:-cja f
- Portuguese:-ção (pt)(unless previous letter was "s", when "ç" becomes "t", like in "digestão", "questão", etc.)
- Romanian:-ție,-țiune(unless previous letter was "s", when "ț" becomes "t", like in "digestie", "chestiune", etc.),-ciune
- Romansch:-ziun m,-schun m
- Russian:-ция(-cija)
- Serbo-Croatian:
- Cyrillic:-ција
- Latin:-cija
- Slovak:-cia f
- Slovene:-cija
- Spanish:-ción (es)(unless previous letter was "s", when "c" becomes "t", like in "digestión", "cuestión", etc.);-xión (for few specific cases)
- Swedish:-tion (sv) c,-ing (sv) c
- Tagalog:-siyon(used for borrowed words, like in "edukasiyon", etc.),-syon,-asyon
- Tajik:-тсия(-tsiya)
- Thai:การ (th)(gaan),ความ (th)(kwaam)
- Turkish:-syon,-siyon
- Turkmen:-siýa
- Ukrainian:-ння(-nnja),-ція(-cija)
- Urdu:-شَن(-śan)(used for borrowed words, like in "اسٹیشن", etc.)
- Uzbek:-tsiya
- West Frisian:-sje
- Yiddish:־ונג (yi) f(-ung),־ציע f(-tsye)
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