u/AdSouthern6247

And can I do it in a week?

The english /ɹ/? The rolled /r/? The french /ʁ/?

In languages that use the rolled r there you'll sometimes find people who can't pronounce it and they will often substitute it with /ʁ/ (like me!) but I dont think I've heard of french speakers not being able to do the glutteral r and rolling it instead (at least when talking about speech defects. I know that there are certain dialects that roll their r's). There are also some english speakers that pronounce r more like w so it isn't very easy either. So which r sound is the easiest one for children ? Has this been studied?