The process of publishing a research paper in an academic journal is stretched a little more if you are a non-native English speaker, because you have to translate or revise the wording of the article a bit, though it will never be the same as if it has been thought and written from scratch by a native English scientist.
But I found in some professors a tendency to criticize the writing of non-native academics, which I think is somewhat unfair, because an academic paper is a research work, not a literature essay.
http://howtopublishinjournals.com/2014/01/12/research-papers-english-language-and-fair-play/