I notice that the "R" letter (sound) is swallowed in some American and British accents and in some accents I hear a really hard "R".
For example: It's [ha:(r)d] [fo:(r)] me to understand.
Does it make any difference for native speakers? Or is it just a marker of the accent?
I have a similar question: even American english, sometimes R is ommited. Is there a rule when to speak hard R and when to skip it in American english? I cant think of any example right now, but I recall that I've heard it a couple of times on TV and in some songs (by American performers of course).