I can't stand people being anal about language! I really struggle sometimes to get words in the correct context, it's accidental, my English is not perfect by any meens and I make lots of silly spelling mistakes but believe me I do try - things just come out muddled and even when I re read things I usually do not see the errors.
The purpose of language is to communicate [NOTE: I originally wrote "communique"] a point and to be understood. Provided one is understood then ones language skills are, by any definition you care to use, sufficient.
Now take Stephen Hawkings, an allegedly very clever person - head of MENSA - pioneer of many incorrect fantasies that he calls scientific theories and much respected for them. Stephen is an extremely poor communicator when he writes.
Don't get me wrong, his grammar and spelling are excellent. The problem is he uses so many long words nobody can understand what he is saying. He does it to make himself sound clever. He is, by the definition of language, a pompous arse.
Having said all that, there is no such word as "jail" on the mainland, it is used only in Ireland where there is a colloquial difference between criminal and political incarceration. The word is "gaol". k thx bye.