I'm English. I am guilty of making some of the mistakes shown in this thread (although I usually catch them before posting, as I do know better). At school I had appalling English tuition - my knowledge of grammar was initially down to
French lessons. In English I was never taught punctuation, sentence structure, verbs, nouns, adjectives, adverbs - let alone morphemes, determiners etc (the latter were only discovered during a course on natural language processing!). I was in my mid twenties before I started to be able to identify what an adjective was, or correctly classify nouns! Pretty appalling stuff.
I am always open to learning new words, always open to being corrected, and always enjoy improving my use of the English language. So please feel free to correct my use at any time (as long as you are sure you are right!) as I do
try to get things right
(let us add right/write to the list!). However, this also means I am less likely to jump on people making mistakes. Whilst I would love to be corrected myself, I am usually too polite (or too aware of being a hypocrite) to correct others
However, it is amusing to watch (no offence) Americans maul the English language and then complain about people mauling the English language through misuse! Or should I say bastardising the language (that is bastardising with an s, not z)...
So apart from just someone misunderstanding "cheque and colour being French", a few other amusing things I observed
1) Guesstimate. Guesstimate (or guestimate) is a word, and funnily enough, it is of US origin. It isn't a clear cut error listing estimate/guesstimate as they're both so similar as to be interchangeable unless giving specific examples.
2) Sence. This isn't even a word
3) You cannot start a sentence with "and". Even on the internet
I will add the following though:
right/write
queue/cue
damn/dam