In Flemish, you can say "Gelukkige pensioen" to wish someone a happy retirement.
In Afrikaans, you can say "gelukkige aftrede" to wish someone a happy retirement.
You can say "joyeuse retraite" in French to wish someone a happy retirement.
"Maligayang pagreretiro" is how you say happy retirement in Tagalog.
Depending on the relationship with the person retiring, would determine what to say in a written Happy Retirement. If the relationship is not a close on, a simple "Congratulations and Happy Retirement" would be sufficient.
Happy retirement! translates as Alles Gute für den Ruhestand.
Deseo que tengas un jubilación feliz.
Happy Birthday and I wish you luck
If you want to say happy retirement in Italian you would say, pensione felice. You would say good luck by saying buona fortuna.
Feliz jubilación! or simply "Felicidades!"
당신 때문에 행복 해요 = because of you I am happy
saengil chukha hamnida