The previous post is spot on. One of my Polish ex-employees, whose written and spoken English was almost faultless, used to show me memos from her 'superior' (a spotty ignorant yoof) which were so badly written as to be as incomprehensible to me as they were to her.
Like many foreigners, she took pride in her English, her appearance, her work, and everything she did, whereas he just messed and lied his way through his working day. He has been on the dole and housing benefit, a burden on the public exchequer, for the last 3 years, whereas she is now running a succesful small business.