I don't know what you're talking about by rolled Rs in Japanese, as that language doesn't do that, unless you're referring to something totally different. I can roll Rs for German and Spanish without any trouble, and I never knew a native English speaker who had trouble pronouncing an L.
My mom is still not able to roll an R and is very frustrated as she's practicing her Spanish. I wasn't able to do it until I was about 18 or 20.
Chasing-The-Light said:
Well, I don't know Japanese, but I have played around with a few European languages that had the rolling R sound, but that was easy for me. However, my bf can't do it to save his life. Some people just can't, I suppose.
On a sort of unrelated note, I've been studying Chinese for 4 years now and there are so many sounds that I still mess up. Like tones, and certain words like 'qu' (pronounced: Chew, but more emphasized) And remembering the difference between words like 'zuo' and 'zou' and 'dou' and 'duo' and 'dao'. Urgh...
In Mandarin, you have two different types of "sh", "ch" and "j" sounds, sh/x, ch/q, and zh/j. A big distinction between these besides the vowels that follow them is that x/q/j are pronounced with the tongue closer to the teeth and sh/ch/zh are farther back.
I took one Chinese course in college and was really surprised by how much trouble students who had been studying the languag for 2+ years still had with pronunciation and tones. I learned Chinese in super strict, concentrated environment in the military, and they really forced you to go over that stuff. I wish universities could give a better focus on the speaking early on so that it doesn't become difficult/problematic, since speaking practice is so important to language studies and seems to get completely glossed over in the beginning. :C