Well I'm a Jehovah witness and we do not really attempt to celebrate birthdays, if we do it' probably because it's a child or something like that
Birthdays = Geburtstage
You can, but they'll more and likely tell you in a polite manner that they don't celebrate birthdays, and they'll tell you why if you ask. I've had a lot of people tell me that, and I did the above.
Impossible to say. Not all publish birthdays.
It is a matter of conscience of the person. We do not celebrate holidays or birthdays, so if it is one of those types of celebrations then I would say that a Jehovah's Witness wouldn't attend.
I would say his life style doesnt appear to fit the life of a Jehovah's Witness. But then the internet only shows so much. There is no evidence to support or refute the suggestion that he may or may not be one of Jehovah's Witnesses.
hacemos cumpleaños
cumpleaños diferentes
Testificar (the verb "to witness"). Un testigo (noun: a witness).
yes like how people say Jesus' or Jesus's
"bautista" Example: John the Baptist -- Juan Bautista
les anniversaires (masc. noun)
生 [sheng] 日 [riˋ]