I guess I should have said I use "w". In Turkish language there is no "w" letter. It's used while talking but it's written as "v" and I dont know the difference between w in "when" and "v" in "vegetable".
My written lower case 'r' looks more like a little 'n'
Ahh odd pronunciations of letters.
When I was younger 11-12 I was in a Choir, one of the exercises we had to do was all on pronunciation or enunciation. It's important to say words clearly when you sing.
I don't do it all the time these days but I can enunciate very clearly when I choose to. R's roll when I'm speaking very clearly.
As a child I was not able to pronounce the r as in read. But I could pronounce the r as in library.
As I grew up I managed to overcome this problem.
common speaking diabilities i Germany are lispling , and not getting the 'sch' or 'ch' right .I had a book where there was a somekind of speaking animal which could prounce ch and sch.
some places in the US like boston dont pronouce the r at the of words like car(caa or cah in stead car with a strong r). i think accent are regional.