If he/she has a name in another language then keep it but modify it if necessary for day to day use, so that teachers, neighbors, you yourselves don't have bother with it.
Face it, if a kid is old enough to know his name already, he won't be happy losing it, especially if he's coping with a whole new family.
But a tiny baby is different. Wait until you find out what you might be stuck with, then decide if you can live with it or if the name might be a handicap in later years.
Our grandaughter now lives with us and her name is Kali - that's the Indian goddess with all the arms, with a chopper in one hand and a head in another. I would prefer it if her name was Carly but she's registered as Kali so that's that! At the moment she seems to be growing into the name. (But she's also in the 'terrible twos' so she may grow out of it.)
Her middle name is Robyn!
Robyn