- Arabic: رَبِيب m (rabīb)
- Armenian: խորթ որդի (xortʿ ordi), խորթ տղա (xortʿ tła) (colloquial)
- Asturian: fiastru (ast) m, andáu (ast) m
- Belarusian: па́серб m (pásjerb), па́сынак m (pásynak)
- Breton: lezvab (br) m, mab-kaer (br) m
- Bulgarian: дове́ден син m (dovéden sin), зава́рен син m (zaváren sin)
- Catalan: fillastre (ca) m
- Chinese:
- Mandarin: 繼/继 (zh) (jì), 繼子/继子 (zh) (jìzǐ)
- Czech: nevlastní syn m
- Dalmatian: fejustro m
- Danish: stedsøn c
- Dutch: stiefzoon (nl) m
- Esperanto: vicfilo, (sometimes) duonfilo
- Finnish: poikapuoli (fi)
- French: beau-fils (fr) m, fillâtre (fr), filsâtre (fr)
- Friulian: fiastri m
- Galician: fillastro m, enteado m
- Georgian: გერი (geri)
- German: Stiefsohn (de) m
- Greek: προγονός (el) m (progonós)
- Hausa: agola
- Hungarian: mostohafiú
- Icelandic: stjúpsonur m
- Ido: stif-filiulo
- Irish: leasmhac m
- Italian: figliastro (it) m
- Japanese: 継息子 (ままむすこ, mamamusuko)
- Kurdish:
- Northern Kurdish: nevis (ku) m
- Latin: prīvignus (la) m
- Latvian: audžu dēls m, padēls m
- Macedonian: пасинок m (pasinok), завареник m (zavarenik)
- Maori: tama whakaangi, tamatāne whakaangi, tama kē
- Middle English: stepsone
- Navajo: hayeʼ ájíłʼíní, hayeʼ jíłʼíní (male speaker), hayáázh ájíłʼíní, hayáázh jíłʼíní (female speaker)
- Norman: bieau-fis m
- Norwegian:
- Bokmål: stesønn m
- Nynorsk: steson m
- Old English: stēopsunu m
- Persian: پسندر (pesandar)
- Polish: pasierb (pl) m
- Portuguese: enteado (pt) m
- Romanian: fiu vitreg m
- Russian: па́сынок (ru) m (pásynok), приёмный сын m (prijómnyj syn)
- Scottish Gaelic: leas-mhac m, mac-cèile m
- Serbo-Croatian:
- Cyrillic: пасторак m, посинак m
- Roman: pastorak (sh) m, posinak (sh) m
- Slovak: nevlastný syn m
- Slovene: pastorek f
- Spanish: hijastro (es) m
- Swedish: styvson (sv) c
- Turkish: üvey oğul (tr)
- Ukrainian: па́синок m (pásynok), па́серб m (páserb)
- Vietnamese: con trai riêng
- Volapük: luson (vo), hilucil
- Welsh: llysfab
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