- Afrikaans: alg, alge
- Ainu: コンボ (kombo)
- Albanian: leshterik (sq) m
- Aleut: qahngus
- Amharic: የባህር አረም (yäbahr ʾäräm)
- Arabic: عُشْب بَحْرِيّ m (ʕušb baḥriyy)
- Aragonese: please add this translation if you can
- Armenian: ծովային ջրիմուռ (covayin ǰrimuṙ)
- Assamese: সাগৰীয়া শেলাই (xagoria xelai)
- Asturian: ocla f
- Aymara: llachu
- Azerbaijani: yosun (az)
- Basque: alga (eu)
- Belarusian: марскі́я во́дарасці (marskíja vódarasci)
- Bengali: সামুদ্রিক শৈবাল (śamudrik śōibal)
- Breton: felu m
- Brunei Malay: rumpai laut
- Bulgarian: водорасли (bg) n pl (vodorasli)
- Burmese: ပင်လယ်ရေမှော် (panglairehmau)
- Catalan: algues (ca) f pl
- Cebuano: sagbot sa dagat
- Chamorro: (please verify) chaguan tasi
- Chichewa: udzu wa m'nyanja
- Chinese:
- Mandarin: 海帶/海带 (zh) (hǎidài), 海藻 (zh) (hǎizǎo), 昆布 (zh) (kūnbù)
- Cornish: goumman
- Corsican: alga
- Czech: chaluha (cs) f
- Danish: tang c
- Dhivehi: please add this translation if you can
- Dogri: समुद्री शैवाल (samudrī śaivāl)
- Dutch: zeewier (nl) n
- Esperanto: algo
- Estonian: adru (et)
- Ewe: ƒumegbewo
- Extremaduran: please add this translation if you can
- Faroese: tari m, alga n
- Finnish: merilevä (fi)
- French: algues (fr) marines (fr) f pl
- Friulian: please add this translation if you can
- Galician: olga f, ouca (gl) f, golfe (gl) m, argazo m, alga (gl) f
- Georgian: ზღვის მცენარეების (zɣvis mcenareebis)
- German: Algen (de) pl, Tang (de) m, Seetang (de) m
- Greek: φύκι (el) n (fýki)
- Ancient: φῦκος n (phûkos)
- Gujarati: સીવીડ (sīvīḍ)
- Haitian Creole: alg
- Hausa: please add this translation if you can
- Hawaiian: limu
- Hebrew: אצה (he)
- Hungarian: hínár (hu)
- Icelandic: þang
- Ido: fuko (io)
- Igbo: ahihia mmiri
- Indonesian: rumput laut
- Interlingua: alga
- Irish: feamainn f
- Italian: alghe (it) f
- Japanese: 海藻 (ja) (かいそう, kaisō)
- Javanese: rumput laut
- Kannada: ಕಡಲಕಳೆ (kn) (kaḍalakaḷe), ಕಡಲಜೊಂಡು (kn) (kaḍalajoṇḍu)
- Kazakh: теңіз балдыры (teñız baldyry)
- Khmer: សារាយ (km) (saaraay)
- Krio: si-sid we dɛn kɔl si-sid
- Kurdish:
- Central Kurdish: جۆگەلە دەریاییەکان (cogele deryayyekan)
- Northern Kurdish: kefz (ku)
- Kyrgyz: деңиз балыры (deŋiz balırı)
- Lao: ສາຫຼ່າຍທະເລ (sā lāi tha lē)
- Latin: alga f
- Latvian: jūraszāles
- Lithuanian: jūros dumblių
- Luganda: omuddo gw’omu nnyanja
- Macedonian: морска трева f (morska treva)
- Maithili: समुद्री शैवाल (samudrī śaivāl)
- Malay: rumpai laut, lumut (ms)
- Malayalam: കടൽപ്പായൽ (kaṭalppāyal)
- Maltese: alka tal-baħar
- Manx: famlagh m, fammyragh m
- Maori: rimurimu, rimurapa moana
- Marathi: शेवाळ (śevāḷ)
- Mirandese: ouca f
- Mongolian: далайн ургамал (dalajn urgamal)
- Nepali: समुद्री शैवाल (samudrī śaiwāl)
- Nogai: сувот (suvot)
- Norman: vrai m
- Northern Sotho: lehola la lewatle
- Norwegian:
- Bokmål: tang (no) m or n
- Nynorsk: tang m or n
- Occitan: algas f pl
- Odia: please add this translation if you can
- Oromo: biqiltuu galaanaa
- Persian: جلبک دریایی (jolbek-e daryâyi), جلوزغ (jolvazaɣ)
- Polish: glon (pl) m, wodorost (pl) m
- Portuguese: alga (pt) f
- Punjabi: ਸੀਵੀਡ (sīvīḍ)
- Quechua: (please verify) qucha yuyu
- Romanian: alge marine
- Russian: во́доросль (ru) f (vódoroslʹ), (usually plural) во́доросли (ru) f pl (vódorosli), морска́я трава́ f (morskája travá)
- Rwanda-Rundi: ibyatsi byo mu nyanja
- Samoan: limu sami
- Sanskrit: समुद्री शैवालः (samudrī śaivālaḥ)
- Sardinian: please add this translation if you can
- Scottish Gaelic: feamainn f, feamad f (Scalpay, Uig), todhar m (North Uist, Benbecula, Eriskay, Barra)
- Serbo-Croatian:
- Cyrillic: морска трава f
- Roman: morska trava f
- Sicilian: please add this translation if you can
- Sindhi: please add this translation if you can
- Sinhalese: please add this translation if you can
- Slovak: please add this translation if you can
- Slovene: morska trava f, haloga f
- Somali: please add this translation if you can
- Spanish: algas (es) f pl
- Swahili: mwani (sw)
- Swedish: tång (sv) c, sjögräs (sv) n
- Tagalog: damong-dagat
- Tamil: please add this translation if you can
- Thai: สาหร่ายทะเล (sǎa-ràai-tá-lee)
- Turkish: deniz yosunu (tr)
- Venetan: ałega
- Vietnamese: tảo biển, rong biển
- Volapük: laleg
- Walloon: please add this translation if you can
- Welsh: gwymon m
- West Frisian: seewier n
- Yiddish: ים־גראָז n (yam-groz)
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