What are some Celtic phrases for happy birthday?

Welsh: Penblwydd Hapus!

Breton: Deiz ha bloaz laouen! or Kalz a vloavezhioù all!

Cornish: Penn-bloedh Lowen!

Irish Gaelic: Breithlá sona duit! or Lá breithe sona duit!

Manx Gaelic: Laa-ruggyree sonney dhyt!

Scottish Gaelic: Co-là breith sona dhut! (informal)

or Co-là breith sona dhuibh! (formal)