You can say "Soy maestro jubilado", or "Soy maestra jubilada" for a female.
Feliz Jubilación
"Maligayang pagreretiro" is how you say happy retirement in Tagalog.
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.
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.
If you want to say happy retirement in Italian you would say, pensione felice. You would say good luck by saying buona fortuna.
Deseo que tengas un jubilación feliz.
Feliz jubilación! or simply "Felicidades!"
You can say "joyeuse retraite" in French to wish someone a happy retirement.
In finnish: hyvää eläkettä
"Feliz aposentadoria."
feliz