How To Say “Happy Birthday” (lit)

Afganistan (Pashto) : Padayish Rawaz Day Unbaraksha!

Afrikaans : Veels Geluk Met Jou Verjaarsdag!

Arabic : Eid Milaad Saeed!

Bangladesh (Bengali) : Shuvo Jonmodin!

Chinese (Mandarin) : Qu Ni Sheng Er Kuai Le!

Danish : Tillykke Med Fodselsdagen!

Dutch : Ne Gelukkege Verjoardach!

French : Bonne Fete! or Joyeux Anniversaire!

German : Gute Zum Geburtstag!

India (Hindi) : Janam Din Ki Badhai! or Janam Din Ki Shubkamnaayein!

Indonesian : Selamat Ulang Tahun!

Italian : Buon Compleanno!

Japanese : Otanjou-Bi Omedetou Gozaimasu!

Korean : Saeng Il Chuk Ha Ham Ni Da!

Latin : Fortuna Dies Natalis!

Malaysian : Selamat Hari Jadi!

Pakistan (Urdu) : Saalgirah Mubarak!

Iran (Persian) : Tavalodet Mobarak!

Philippines (Tagalog) : Maligayang Bati Sa Iyong Kaarawan!

Portuguese : Feliz Aniversario! or Parabens!

Russian : S Dniom Razhdjenia! or Pazdravliayu S Dniom Razhdjenia!

Spanish : Feliz Cumplea–Os!

Thai : Suk San Wan Keut!

Turkish : Dogum Gunun Kutlu Olsun!

Vietnamese : Chuc Mung Sinh Nhat! 

(from many sources)