- Afrikaans: Laptefsee
- Arabic: بَحْر لابْتِيَف m (baḥr lābtiyaf)
- Armenian: Լապտեւների ծով (hy) (Laptewneri cov)
- Azerbaijani: Laptevlər dənizi
- Basque: Laptev
- Belarusian: Мора Лапцевых n (Móra Lapcjevyx)
- Bengali: লাপ্তেভ সাগর (laptebh śagor)
- Breton: Mor Laptev m
- Bulgarian: Море Лаптеви n (More Laptevi)
- Burmese: လက်ပတက်ပင်လယ် (lakpa.takpanglai)
- Catalan: mar de Làptev f
- Chinese:
- Mandarin: 拉普捷夫海 (Lāpǔjiéfū Hǎi)
- Czech: Moře Laptěvů n
- Danish: Laptevhavet n
- Dutch: Laptevzee f
- Esperanto: Lapteva maro
- Estonian: Laptevite meri
- Finnish: Laptevinmeri (fi)
- French: mer des Laptev (fr) f
- Galician: Mar de Laptev m
- Georgian: ლაპტევების ზღვა (laṗṭevebis zɣva)
- German: Laptewsee f
- Greek: Θάλασσα Λάπτεφ f (Thálassa Láptef)
- Hebrew: ים לאפטב m (yám láptev)
- Hindi: लापतेव सागर (lāptev sāgar)
- Hungarian: Laptyev-tenger (hu)
- Icelandic: Laptevhaf n
- Indonesian: Laut Laptev
- Irish: Muir Laptaiv f
- Italian: mare di Laptev f
- Japanese: ラプテフ海 (Raputefu-kai)
- Kazakh: Лаптев теңізі (Laptev teñızı)
- Khmer: សមុទ្រឡាប់តែវ (sɑɑmutrɔɔlaptaew)
- Korean: 랍테프해 (raptepeuhae)
- Kyrgyz: Лаптевдер деңизи (Laptevder deŋizi)
- Latvian: Laptevu jūra f
- Lithuanian: Laptevų jūra f
- Macedonian: Лаптевско Море n (Laptevsko More)
- Malay: Laut Laptev
- Malayalam: ലാപ്ടേവ് കടൽ (lāpṭēvŭ kaṭal)
- Marathi: लापतेव समुद्र (lāptev samudra)
- Norwegian:
- Bokmål: Laptevhavet n
- Nynorsk: Laptevhavet n
- Persian: دریای لاپتف (daryâ-ye lâptev)
- Polish: Morze Łaptiewów (pl) n
- Portuguese: Mar de Laptev m
- Punjabi: ਲਾਪਤੇਵ ਸਮੁੰਦਰ (lāptev samundar)
- Romanian: Marea Laptev f
- Russian: мо́ре Ла́птевых (ru) n (móre Láptevyx)
- Serbo-Croatian:
- Cyrillic: Лаптевско море n
- Roman: Laptevsko more n
- Slovak: More Laptevovcov n
- Slovene: Morje Laptevov n
- Spanish: mar de Láptev m
- Swedish: Laptevhavet n
- Tamil: லாப்டேவ் கடல் (lāpṭēv kaṭal)
- Thai: ทะเลลัปเตฟ (tà-lee láp-dtèef)
- Turkish: Laptev Denizi
- Ukrainian: Мо́ре Ла́птєвих n (Móre Láptjevyx)
- Uzbek: Laptevlar dengizi
- Vietnamese: biển Laptev
- Welsh: Môr Laptev m
- West Frisian: Laptevsee
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