No. If the quality of the MS is good and it is submitted for publication in a suitable journal, it is likely to be accepted even in top international journals. Those who are weak in English should take help from others before submitting the MS. I believe many people would be glad to help in this aspect.
It has been shown (according to some research) that affiliation to the country impacts acceptance. When you live in outside English-speaking countries, the editors will become more rigorous and wouldn't accept the paper with the same standards as if you're living in an English-speaking country. A Korean scientist experienced this when he found that is is more difficult to publish a paper while he's in Korea, but when he returned to U.S. (or U.K., I don't remember) he found it more easier to publish.
Also, your affiliation with the institution is also important (and maybe more important than the country) as it has been shown repeatedly.
How to deal with these biases? just collaborate with other researchers from countries and institutions all around the world and your acceptance rate will increase and your paper will become more visible.
I would highly recommend a book by Karen Englander:
Writing and Publishing Science Research Papers in English: A Global Perspective
No. If the quality of the MS is good and it is submitted for publication in a suitable journal, it is likely to be accepted even in top international journals. Those who are weak in English should take help from others before submitting the MS. I believe many people would be glad to help in this aspect.
I got my first paper accepted in Taxon (a reputed journal in plant taxonomy) after trying hard for more than 15 years. Five to six of my submitted MSS were returned by the Editor of Taxon after some improvements and suggestions were given to publish in regional journals. I never felt that the MSS were not accepted deliberately. The one which I got accepted was far far better than those earlier submitted MSS.
Country may not matter, but INSTITUTION (as University) paying subscription and publishing of articles at regular basis in the journal / journal group may matter.
I don't think so. A paper's acceptance by good and peer reviewed journals is purely based on the quality of the research and not the institution affiliation and/or rank of the author(s). Probably, that is what predatory journals does. Best regards
If you are not a native English speaker, the editors and reviewers will review you English in detail. If the paper is very good, but the English is not good, probably the paper will be rejected "ad portas" by the managing / associate editor, requesting a reviewed version (with the English improved) before to send it out for review (high impact journals).
Yes, to some extent your affiliation, reputation and country of residence may influence the reviewers. It has been well known that some of the path breaking papers have been rejected at first instance, but the opinion of the Editor played an important role in the papers getting published. Any paper which repudiates the well known facts will be thoroughly scrutinized by the reviewers (2 or 3 or even more).