The correct way to say Happy Birthday to someone who speaks European Portuguese is as follows. Say "Feliz aniversario." That means Happy Birthday in Portuguese.
"Feliz dia da mãe."
"Happy Anniversary" in Portuguese is "Feliz Aniversario", the same as in Spanish.
Feliz aposentadoria.
Feliz.
Feliz Aniversário
Feliz aniversário
"feliz aniversário"
Feliz Aniversário!
Felizes Férias.
Felizes Férias.