I have high confidence in the translations in bold text.
If you can provide a better translation for any of these, please leave a comment below.
| Afrikaans | Gelukkige verjaarsdag! |
| Albanian | Gëzuar ditëlindjen! |
| Amharic | መልካም ልደት! |
| Arabic | عيد مولد سعيد! |
| Armenian | Ծնունդդ շնորհավոր! |
| Azerbaijani | Ad günün mübarək! |
| Basque | Zorionak! or Pozik Urtebetetzea! |
| Belarusian | З Днём Нараджэння! |
| Bengali | শুভ জন্মদিন! |
| Bosnian | Sretan rođendan! |
| Bulgarian | Честит Рожден ден! |
| Catalan | Per molts anys! |
| Cebuano | Malipayon Birthday! |
| Cherokee | ᎤᎵᎮᎵᏍᏗ ᏂᏣᏕᏘᏯ (Ulihelisdi nitsadetiya) |
| Chichewa | Tsiku labwino lobadwa! |
| Chinese (Simplified) | 生日快乐 |
| Chinese (Traditional) | 生日快樂 |
| Corsican | Felice Anniversariu! |
| Croatian | Sretan rođendan! |
| Czech | Všechno nejlepší k narozeninám! |
| Danish | Tillykke med fødselsdagen! |
| Dutch | Fijne verjaardag! |
| English | Happy Birthday! |
| Esperanto | Feliĉan naskiĝtagon! |
| Estonian | Palju õnne sünnipäevaks! |
| Filipino | Maligayang kaarawan! |
| Finnish | Hyvää syntymäpäivää |
| French | Bon anniversaire! |
| Frisian | Lokkige jierdei! |
| Galician | Feliz Aniversario! |
| Georgian | გილოცავ დაბადების დღეს! |
| German | Alles Gute zum Geburtstag! |
| Greek | Χαρούμενα γενέθλια! |
| Gujarati | જન્મદિવસ ની શુભકામના! |
| Haitian Creole | Bòn Fèt! |
| Hausa | Barka da ranar haihuwa! |
| Hawaiian | Hauʻoli Lā Hānau! |
| Hebrew | יום הולדת שמח! |
| Hindi | जन्मदिन की शुभकामनाएं! |
| Hmong | Zoo siab hnub yug! |
| Hungarian | Boldog születésnapot! |
| Icelandic | Til hamingju með afmælið! |
| Igbo | Ezi ncheta ọmụmụ! |
| Indonesian | Selamat ulang tahun! |
| Irish | Lá breithe shona duit! |
| Italian | Buon compleanno! |
| Japanese | お誕生日おめでとうございます！ |
| Javanese | [Happy Birthday!] |
| Kannada | ಜನ್ಮದಿನದ ಶುಭಾಶಯಗಳು! |
| Kazakh | Туған күнің құтты болсын! |
| Khmer | រីករាយថ្ងៃកំណើត! |
| Korean | 생일 축하합니다! |
| Kurdish (Kurmanji) | Rojbûna te pîroz be |
| Kyrgyz | Туулган кунуңуз менен куттуктайм! |
| Lao | ສຸກສັນວັນເກີດ! |
| Latin | Felix natalis! |
| Latvian | Daudz laimes dzimšanas dienā! |
| Lithuanian | Su gimtadieniu! |
| Luxembourgish | Alles Guddes fir de Gebuertsdag! |
| Macedonian | Среќен роденден! |
| Malagasy | Tratry ny tsingerintaona nahaterahana! |
| Malay | Selamat Hari lahir! |
| Malayalam | ജന്മദിനാശംസകൾ! |
| Maltese | [Happy Birthday!] |
| Maori | Birthday hari! |
| Marathi | वाढदिवसाच्या शुभेच्छा! |
| Mongolian | Төрсөн өдрийн мэнд! |
| Myanmar (Burmese) | ပျော်ရွင်ဖွယ်ရာမွေးနေ့! |
| Navajo | Baa Hózhǫ́ǫgo Nidizhchí! or Baa Hózhǫǫgo Ninááhai! |
| Nepali | जन्मदिनको शुभकामना! |
| Norwegian | Gratulerer med dagen! |
| Pashto | کلیزه دی نیکمرغه! |
| Persian | تولدت مبارک! |
| Polish | Wszystkiego najlepszego! |
| Portuguese | Feliz Aniversário! |
| Punjabi | ਜਨਮਦਿਨ ਮੁਬਾਰਕ! |
| Romanian | La multi ani! |
| Russian | С днем рождения! |
| Samoan | Manuia le aso fanau! |
| Scots Gaelic | Co-là-breith math! |
| Serbian | Срећан рођендан! |
| Sesotho | Letsatsi le monate la tsoalo! |
| Shona | Bhavhadhe rinofadza! |
| Sindhi | سالگراه مبارڪ! |
| Sinhala | සුබ උපන්දිනයක් වේවා! |
| Slovak | Šťastné narodeniny! |
| Slovenian | Vse najboljše! |
| Somali | Dhalasho Wacan! |
| Spanish | ¡Feliz cumpleaños! |
| Sundanese | Wilujeung tepang taun! |
| Swahili | Siku njema ya kuzaliwa! or Pongezi kwa siku ya kuzaliwa! or Furaha ya siku ya kuzaliwa! (happiness for the day of being born) |
| Swedish | Grattis på födelsedagen! |
| Tajik | Зодрӯз муборак! |
| Tamil | பிறந்தநாள் வாழ்த்துக்கள்! |
| Telugu |
పుట్టినరోజు శుభాకాంక్షలు! or సంతోషంగా పుట్టినరోజు (Santōṣaṅgā puṭṭinarōju) |
| Thai | สุขสันต์วันเกิด (S̄uk̄hs̄ạnt̒ wạn keid!) |
| Turkish | Doğum günün kutlu olsun! |
| Ukrainian | З Днем народження! |
| Urdu | سالگرہ مبارک! |
| Uzbek | Tug’ilgan kuning bilan! |
| Vietnamese | Chúc mừng sinh nhật! |
| Welsh | Penblwydd hapus! |
| Xhosa | Usuku lokuzalwa olumnandi! |
| Yiddish | מזל דיין געבורסטאָג! |
| Yoruba | O ku ojo ibi! |
| Zulu | Usuku olumnandi lokuzalwa! |