Are there different grades or categories of questions and answers posted on the main site and meta site? I have viewed very highly upvoted questions and answers. I guess some other questions and answers are media, some are less than medium. others are low-quality posts. I am suspended for low-quality posts very often on many sites. The recent suspension is on the "English language and usage" site. Are badges and reputations awarded on country or region wise?
my question is that are badges and reputations awarded on country or region wise?
No. It's purely based on the content and how the community votes on your posts. Stack Exchange is a global platform, there is no distinction between users from different countries. Of course, native English speakers may fare better (except on sites like Stack Overflow en español) but many ESLs, including yours truly are holding their own on the network.
Are there different grades or categories of questions and answers posted on the main site and meta site.
Well, Meta gets much fewer questions, but also fewer visits and hence less votes. Also, some questions on the main site have a very high number of views because they often appear in Google search results or were a Hot Network Question for a certain amount of time.
I am suspended for low-quality posts very often on many sites. My most recent suspension is on the "English Language & Usage" site.
That's sad, but we can't really help with this, other than pointing you at the FAQ on Meta Stack Exchange: What can I do when getting "We are no longer accepting questions/answers from this account"? You are not question banned on this site, FWIW, but you do have some deleted and negatively scoring posts, so please be careful.
I think Europe, North America, South America, Australia, and Africa are mainly English speaking continents.
Citizens meaning users of these continents study high-standard English books. They are in a commanding position over Asians, especially over Indians.
They muddle along with the English language and the limit set for/by them is low. literally, Most players prefer a dead-draw position in a chess play with western country players.