Afrikaans: Nagmerrie
Albanian: Kosovë
Amharic: ሐሰት (haset)
Arabic: كابوس (kabous)
Armenian: Կերպ (kerp)
Azerbaijani: Xəyal
Basque: Elira
Belarusian: Кошмары (koshmary)
Bengali: দুঃস্বপ্ন (duḥswapna)
Bosnian: Noćna mora
Bulgarian: Кошмар (koshmar)
Catalan: Mal son
Cebuano: Naga damgo
Chichewa: Kuopsa
Chinese (Simplified): 恶梦 (è mèng)
Chinese (Traditional): 惡夢 (è mèng)
Corsican: Incubo
Croatian: Noćna mora
Czech: Noční můra
Danish: Mareridt
Dutch: Nachtmerrie
English: Nightmare
Esperanto: Noktomoro
Estonian: Õudusunenägu
Finnish: Painajainen
French: Cauchemar
Galician: Pesadilla
Georgian: კოშმარი (koshmari)
German: Albtraum
Greek: Εφιάλτης (efiáltis)
Gujarati: બુરા સપના (burā sapnā)
Haitian Creole: Koze reve
Hausa: Barci mai tsoro
Hawaiian: Noe noho
Hebrew: סיוט (siyut)
Hindi: बुरा सपना (burā sapnā)
Hmong: Zaj npau suav
Hungarian: Rémálom
Icelandic: Martröð
Igbo: Nrọ dị egwu
Indonesian: Mimpi buruk
Irish: Brionglóid
Italian: Incubo
Japanese: 悪夢 (akumu)
Javanese: Ngimpi elek
Kannada: ದುಃಸ್ವಪ್ನ (duḥswapna)
Kazakh: Арман (arman)
Khmer: សុបិន្ទភ្លែច (sopent phleach)
Korean: 악몽 (akmong)
Kurdish: Xewn
Kyrgyz: Түнкү түш (tünkü tüş)
Lao: ຄວາມແອດສຽນ (khwāṃ āet siān)
Latin: Nocturnus somnium
Latvian: Naktsmāra
Lithuanian: Košmaras
Luxembourgish: Nachtmerrie
Macedonian: Ноќна мора (noḱna mora)
Malagasy: Rêve ratsy
Malay: Mimpi buruk
Malayalam: ഭയം (bhayaṁ)
Maltese: Incubo
Maori: Pohewa
Marathi: दु:स्वप्न (duḥswapna)
Mongolian: Бүжиг (bujig)
Nepali: दुःस्वप्न (duḥswapna)
Norwegian: Mareritt
Pashto: خراب خوب (kharab khob)
Persian: کابوس (kābus)
Polish: Koszmar
Portuguese: Pesadelo
Punjabi: ਬੁਰਾ ਸੁਪਨਾ (burā supnā)
Romanian: Coșmar
Russian: Кошмар (koshmar)
Samoan: Māmā
Scots Gaelic: Bruadar
Serbian: Ноћна мора (noćna mora)
Sesotho: Moeketsi
Shona: Dambudziko
Sindhi: برا خواب (burā khwab)
Sinhala: භයංකර සිහිනය (bhayankara sihinaya)
Slovak: Nočná mora
Slovenian: Nočna mora
Somali: Riyo xun
Spanish: Pesadilla
Sundanese: Impian goréng
Swahili: Ndoto mbaya
Swedish: Mardröm
Tajik: Хоб (khob)
Tamil: கெட்ட கனவு (keṭṭa kaṉavu)
Telugu: భయంకరమైన కల (bhayankaramaina kala)
Thai: ฝันร้าย (fǎn rái)
Turkish: Kâbus
Ukrainian: Кошмар (koshmar)
Urdu: خوفناک خواب (khaufnaak khwab)
Uzbek: Xayol
Vietnamese: Ác mộng
Welsh: Pesgwydd
Xhosa: Uhlanga
Yiddish: נאַכטמאַר (nakhtmar)
Zulu: Uhlanga