- Albanian: besnik (sq)
- Arabic: وَفِيّ (wafiyy), مُخْلِص (muḵliṣ)
- Armenian: հավատարիմ (hy) (havatarim)
- Azerbaijani: sadiq (az), sədaqətli (az), vəfalı (az)
- Bashkir: тоғро (toğro)
- Belarusian: ве́рны (vjérny)
- Bengali: বিশ্বস্ত (bn) (biśśosto), অনুগত (bn) (onugoto)
- Bulgarian: ве́рен (bg) (véren), пре́дан (bg) (prédan)
- Burmese: သစ္စာရှိ (my) (saccahri.)
- Catalan: fidel (ca), lleial (ca)
- Chinese:
- Mandarin: 忠實/忠实 (zh) (zhōngshí)
- Czech: věrný (cs) m
- Danish: trofast
- Dutch: getrouw (nl)
- Esperanto: fidela (eo)
- Estonian: ustav, truu
- Finnish: uskollinen (fi)
- French: fidèle (fr), loyal (fr)
- Friulian: fidêl
- Galician: fiel (gl), leal (gl)
- Georgian: ერთგული (ertguli)
- German: treu (de), loyal (de), anhänglich (de), treu ergeben, zuverlässig (de), getreu (de)
- Gothic: 𐍄𐍂𐌹𐌲𐌲𐍅𐍃 (triggws)
- Greek: πιστός (el) (pistós)
- Ancient: πιστός (pistós)
- Hebrew: נֶאֱמָן (he) (ne'emán)
- Hindi: निष्ठावान (niṣṭhāvān), वफ़ादार (vafādār)
- Hungarian: hű (hu), hűséges (hu)
- Icelandic: trúr (is), tryggur (is)
- Ido: fidela (io)
- Indonesian: setia (id)
- Ingrian: vernoi
- Italian: fedele (it), ligio (it) m
- Japanese: 忠実な (ja) (ちゅうじつな, chūjitsu na)
- Kazakh: адал (adal)
- Khmer: ចិត្តត្រង់ (cət trɑng)
- Korean: 충실하다 (ko) (chungsilhada)
- Kurdish:
- Northern Kurdish: wefadar (ku), dilsoz (ku)
- Kyrgyz: ишенимдүү (ky) (işenimdüü), динге ишенген (ky) (dinge işengen), чынчыл (ky) (cıncıl), ишенчиликтүү (ky) (işenciliktüü), так (ky) (tak)
- Ladin: fedel
- Lao: ຊື່ (sư̄), ຊື່ຕົງ (sư̄ tong)
- Latgalian: teirserdeigs
- Latin: firmus, fidēlis m or f, fidus
- Latvian: godprātīgs, uzticīgs
- Lithuanian: ištikimas
- Low German:
- German Low German: tro
- Macedonian: верен (veren)
- Malay: setia (ms)
- Maori: pirihonga, piripono
- Mongolian:
- Cyrillic: үнэнч (mn) (ünenč)
- Mongolian: ᠦᠨᠡᠨᠴᠢ (ünenči)
- Norwegian:
- Bokmål: trofast (no)
- Nynorsk: trufast
- Old English: trīewe, ġetrīewe
- Pashto: وفادار (wafādãr)
- Persian: وفادار (fa) (vafâdâr)
- Polish: wierny (pl)
- Portuguese: fiel (pt), leal (pt)
- Romagnol: fidél
- Romanian: fidel (ro), loial (ro)
- Russian: ве́рный (ru) (vérnyj), пре́данный (ru) (prédannyj)
- Sanskrit: निष्ठावान् (niṣṭhāvān), भक्त (sa) (bhakta)
- Sardinian: fidele, fideli, fieli
- Scottish Gaelic: dìleas
- Serbo-Croatian:
- Cyrillic: веран, вјеран
- Roman: veran (sh), vjeran (sh)
- Sicilian: fideli
- Slovak: verný (sk)
- Slovene: zvest (sl)
- Spanish: fiel (es), leal (es)
- Swedish: trogen (sv)
- Tajik: вафодор (vafodor)
- Telugu: నమ్మకమైన (te) (nammakamaina)
- Thai: ซื่อสัตย์ (th) (sʉ̂ʉ-sàt), จงรัก (th) (jong-rák), ซื่อตรง (th) (sʉ̂ʉ-dtrong), ซื่อ (th) (sʉ̂ʉ)
- Turkish: sadakatli (tr), sadık (tr), vefakar, vefakâr (tr), vefalı (tr)
- Turkmen: wepaly
- Ukrainian: ві́рний (vírnyj), ві́дданий (víddanyj)
- Urdu: وفادار (vafādār)
- Uyghur: سادىق (sadiq), ۋاپادار (wapadar)
- Uzbek: sodiq (uz), vafodor (uz)
- Vietnamese: chung thủy (vi)
- Welsh: fyddlon
- Yiddish: טרײַ (tray), געטרײַ (getray)
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