- Arabic: عَلَاقَة غَرَامِيَّة f (ʕalāqa ḡarāmiyya)
- Belarusian: рама́н m (ramán), любо́ўная су́вязь f (ljubóŭnaja súvjazʹ)
- Bulgarian: любо́вна връ́зка f (ljubóvna vrǎ́zka)
- Chinese:
- Mandarin: (illicit) 偷香竊玉/偷香窃玉 (zh) (tōuxiāngqièyù), (romantic) 風流韻事/风流韵事 (zh) (fēngliúyùnshì), 外遇 (zh) (wàiyù), 私情 (zh) (sīqíng)
- Danish: kærlighedsaffære c, affære (da) c
- Esperanto: amafero, amaĵo, amintrigo
- Estonian: armuafäär
- Faroese: fjas
- Finnish: rakkausseikkailu, rakkausjuttu, rakkaussuhde (fi)
- French: aventure (fr) f, liaison (fr) f
- German: Liebesabenteuer (de) n, Liebesaffäre (de) f, Liaison (de) f, Techtelmechtel (de) n, Seitensprung (de) m, Bettgeschichte (de) f, Liebschaft (de) f, Affäre (de) f
- Greek: ερωτοδουλειά (el) f (erotodouleiá)
- Hungarian: szerelmi viszony (hu), szívügy (hu)
- Icelandic: ástarævintýri n
- Italian: relazione amorosa f, affare di cuore m, tresca (it) f, legame sentimentale m, storia (it) f, avventura (it) f
- Japanese: 情事 (ja) (じょうじ, jōji), 色恋沙汰 (いろこいざた, irokoizata), 色恋 (ja) (いろこい, irokoi), ラブアフェア (rabu afea), 不倫 (ja) (ふりん, furin)
- Korean: 러브 어페어 (reobeu eopeeo), 정사(情事) (ko) (jeongsa), 연애 사건(戀愛事件) (yeonae sageon), 련애 사건(戀愛事件) (ryeonae sageon) (North Korea), 불륜(不倫) (bullyun)
- Latin: amōrēs (la) m pl, cōnsuētūdō f
- Latvian: attiecības f pl
- Lithuanian: meilės santykis m
- Macedonian: љубовна врска f (ljubovna vrska), афе́ра f (aféra)
- Norwegian:
- Bokmål: kjærlighetsaffære m
- Nynorsk: kjærleiksaffære
- Polish: romans (pl) m
- Portuguese: caso (pt) m
- Russian: рома́н (ru) m (román), любовное похожде́ние n (ljubovnoje poxoždénije), любо́вная интри́га f (ljubóvnaja intríga), любо́вная связь f (ljubóvnaja svjazʹ), (hanky-panky) шу́ры-му́ры (ru) f pl (šúry-múry), ша́шни (ru) m pl (šášni), аму́ры (ru) m pl (amúry)
- Spanish: ligue (es) m, escarceo amoroso, aventura (es) f, devaneo (es) m, affaire (es) m ((fem. in Argentina and Uruguay)), lío (es) m, rollo (es) m, idilio (es) m, romance (es) m, amorío (es) m, embullo (es) m (Dominican Republic)
- Swedish: kärleksaffär c, affär (sv) c, förhållande (sv) n
- Ukrainian: рома́н m (román), любо́вний зв'язо́к m (ljubóvnyj zvʺjazók)
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