As I'm not a native speaker, I often see that my posts (either questions or answers) get edited. Sometimes people edit my post to fix spelling mistakes / language use errors. What do you think about an option to be able to mark the typos / mistakes that people make in their posts i.e. with a red font? Or, maybe provide a post version history so people could see what the errors in their posts originally were? There is of course the spelling dictionary, but the dictionary fails to catch all of the errors (like phase context related questions or tense related errors). On the other hand, if this feature was already present, I don't know if users would not abuse it to i.e. mark everything in red. What do you think? Also, there is a concern if Stack Exchange should be a content providing site or a site that teaches English language to others.

Regards

PS. I hope this question won't be edited ;)

As I'm not a native speaker, I often see that my posts (either questions or answers) get edited. Sometimes people edit my post to fix spelling mistakes / language use errors. What do you think about an option to be able to mark the typos / mistakes that people make in their posts i.e. with a red font? Or, maybe provide a post version history so people could see what the errors in their posts originally were? There is of course the spelling dictionary, but the dictionary fails to catch all of the errors (like phase context related questions or tense related errors). On the other hand, if this feature was already present, I don't know if users would not abuse it to i.e. mark everything in red. What do you think? Also, there is a concern if Stack Exchange should be a content providing site or a site that teaches English language to others.