"In every language" makes this question impossible to answer.
I am happy can be translated into Kikuyu language as de mukenu.
To say happy birthday in Luhya language, you can say "Olila Indiana."
The translated way to to say Happy Christmas in the Malyalam language is "Happy Krismas."
How do you say Happy Birthday in haida language
Happy Diwali
To sign "Are you happy?" in American Sign Language, you would sign: YOU HAPPY? with raised eyebrows.
In the Inuit language, you can say "Quviasukkaa" which means happy birthday.
The English words "I am happy today" are translated into "Nyangaino esangaree" in African Luhya language.
Happy Birthday
You say "Happy new year" in Yoruba language of the Western African origin as "Eku odun tuntun".
You say "I am very happy" in Yoruba language of the Western African origin as "Inumi dun gan".
Happy mother's day