The magic of the modern day means you can type “define” or “pronounce” then any word into Google and it’ll tell you how to say it. There’s also an absurd amount of YouTube pronunciation videos for basically every word that exists.
Not that there’s a problem asking, this is more advice for future words your friend doesn’t know. So you can help them. The dummy.
I’d wager the vast majority of people that don’t know anything about another person’s religion couldn’t tell if what they’re saying is true or not.
Circumcision, fasting, transubstantiation, without any knowledge or frame of reference there really is no way to tell if someone is just talking out of their ass or not when it comes to religious traditions.