Romance Languages:
* Spanish: Feliz
* French: Heureux/Heureuse
* Italian: Felice
* Portuguese: Feliz
* Romanian: Fericit/Fericită
Germanic Languages:
* German: Glücklich
* Dutch: Gelukkig
* Swedish: Glad/Lycklig
* Norwegian: Glad/Lykkelig
* Danish: Glad/Lykkelig
* Icelandic: Hamingjusamur
Slavic Languages:
* Russian: Счастливый (schastlivy)
* Polish: Szczęśliwy
* Czech: Šťastný
* Ukrainian: Щасливий (schastlyvy)
* Serbian: Срећан (srećan)
* Bulgarian: Щастлив (schastliv)
Asian Languages:
* Japanese: 幸せ (shiawase)
* Chinese (Mandarin): 快乐 (kuài lè)
* Korean: 행복 (haengbok)
* Hindi: खुश (khush)
Other Languages:
* Arabic: سعيد (sa'eed)
* Greek: Ευτυχισμένος (eftychimenos)
* Hebrew: שמח (sameach)
* Turkish: Mutlu
This is just a small selection of languages. There are many more languages in the world, each with its own unique way of expressing happiness.