I realise that for a great number of users English is not their native language, and therefore the English writing will frequently contain mistakes. I have no issue spending some of my time making edits to such sort of genuine mistakes. I firmly believe we should be encouraging non-native English speakers to participate and use English to the best of their abilities.
However, deliberate use of slang, abbreviations, colloquialisms etc. should be avoided. Users should be at least trying to write in correct English to avoid confusion, improve clarity, and help make all posts accessible to all users. There are a number of users who do not do this.
For example, the following question features such problems:
"When I was younger like 10 I used to drop big logs but now I'm older my logs are not so big"
and a subsequent comment shows the confusion:
"I honestly thought at first he was talking about chopping wood or wearing wooden shoes"
And comments on an answer were also poorly written:
"Downvoters didnt study enough poop in school cuz they were grossed out and thought ''eeww icky', but I went the distance for you @Jan, you know me n you is down."