First off, don't study a course you're not interested in! Believe me your first year will be hell and a mash up of complaining and regret (many of my friends chose subjects they hated).
I did RS in a similar position to you, loving philosophy and ethics and not caring much about the religion part! I loved it anyway. The philosophy and ethics units were big and we covered Buddhism as our religion which was surprisingly fascinating (although not many schools do it so check what the religion you cover would be).
I'm not a language student, I didn't even do a GCSE in one, but I could imagine doing two could be hard at A Level. But if you enjoy them and are confident in your ability, go for it!
I do an EPQ too so if you have any questions on that or any other questions I'll happily answer!