@dancingtreefrog @timtfj I would say also very good, for the L English sound I, coming from Spanish, prefer the L letter because the mechanism is more similar than to R.
Then there's the fact that for Sino-Japanese[1] languages, they confuse both sounds, and I don't know exactly why.
[1] not an academic, so I don't know the right term.
@mdione @dancingtreefrog I don't know any of those languages, but don't they use a sound which is more or less midway between our R an L? So R and L will just sound like variants of that phoneme, not two different ones?
@timtfj @dancingtreefrog that's above my knowledge. I only think in terms of how I move the parts of my mouth to produce the sound. R is a quick tap of the roof, L is more "soft" (sorry, again, not an academic, I lack the words.), a more gentle close/open movement. I'm not sure you can do the same tap with the English L, maybe the Indian R is the closest.
In Spanish and Italian, RR is worse, it's a trill.