I wasn't referring to the people in this forum and I wasn't referring to the typos. It's easy to see the difference between a typo and a spelling mistake. To be honest, over the years I've noticed that many native English speakers don't know the difference between to/too, they're/their/there, than/then, who's/whose, it's/its, are/our etc. and they often misspell common English words ("definitely" becomes "definately" etc.). In my experience, non-native English speakers are less likely to make these mistakes and they tend to memorise correct spelling of the English words better.