"J'ai -------- ans." literally means: I have -------- years. It's interpreted as: I'm -------- years old.
j'ai = I have
"fei jai" is not French.
As for me, I have....
my name
"croyez-moi" means "believe me" in French.
Donnez-moi in French means give me in English
"Pour moi" means "for me" in French.
Qui, moi? in French means "Who, me?" in English.
It is French for "Listen to me" and is used with children to mean "Mind me" or "Do what I tell you to."
"moi" in French means "me" in English
"croyez-moi" means "believe me" in French.
Donnez-moi in French means give me in English
"Pour moi" means "for me" in French.
The French word "moi" translates to "me" in English.
My French
"moi" in French means "me" in English
moi aussi means 'me too' in French.
Prêt pour moi means 'ready for me' in English.
Qui, moi? in French means "Who, me?" in English.
This is text language reading 'I can't, I have a date (or an appointment) and I have to have (something) with me.
"moi jai onze ans" is incorrect French. It seems like you meant to say "j'ai onze ans" which means "I am eleven years old" in English.