Be aware of culturally different spellings and word usages
It is well known that there are different, but correct, spellings for certain words. Examples are color and colour, behaviour and behavior, analyse and analyze. An editor should not change the author's version of the spellings to their own.
However, it may be acceptable to make the spellings consistent with one form if it is clear the author can't spell; but you should be confident with spelling in American, British or Canadian etc.
Culturally variant vocabulary is more difficult, and to avoid the semantic differences in words between readers it can be helpful to stick to a more academic style of writing. As this is Academia.SE we should be able to use language forms that might be acceptable in a disertation or journal paper. This often avoids those semantic variations that occur in more casual language.
If an article already contains typos and other errors, formalising the language may improve its universal readability.