Firstly, you are talking total nonsense Dobry. When an American speaks grammaticaly correct American English, reasonably intelligent people from other parts of the English speaking world do not hear errors, no matter how much the vocabulary, syntax or grammar differs from their own 'standard'. They are speaking 'perfect' English.

Secondly, it is quite clear from the context what Ramil meant by 'perfect', and your nit-picking over that definition is adding absolutely nothing whatsoever to the discussion.