Thanks for your answer.
Actually i did try google it first and that's how i managed to thansate the other fields.
However, as far as i can see, that don't work for Custom Fields Description.
So i decided to give it a "shot" here, and maybe someone have the same need and share the solution.
Thanks for the link, but i don't know why, these fields won't translate that way.
If somehow i'm mistaken, or if anybody here know how to do this, please share it.
Cheers