Sigh I don't know if this is a question as much as it is a comment... Sadly I suspect that those who will take the time to read my comment (e.g. those of us that check out Meta) are probably not guilty of this sort of thing... Nevertheless I feel that I have to say something:
Over the past couple of weeks I've started to notice an uptick in posts/users who can best be described as "English is not their first language." I've also noticed that many of these posts (some questions, but even more answers) collecting downvotes on what would otherwise be considered 'perfectly reasonable' answers... Often not the best answers, but at the same time not obviously wrong or harmful answers either.
While I agree completely with the notion that downvoting should be private, and shouldn't require an explanation, and sure, it could be argued that maybe these posts are gathering downvotes for other reasons; at the same time I want to point out that there are other options aside from downvoting... Options such as editing (if you have the rep), or flagging for a mod to edit (if you don't). Or just not unpvoting something that isn't wrong, but also isn't the best answer. Downvoting seems unnecessarily punitive for something that (in all likelihood) the OP can't really do anything about (at least in the short term of asking or answering a question on photo-SE) and it would be much better as a small community if we were welcoming to everyone who visits by not hauling out the 'punishment stick' for every little thing that comes through and rubs someone the wrong way...
I'm not at all trying to point fingers at anyone in particular, and again, I'm probably barking up the wrong tree as I'm sure that those who care enough about the community to spend time in Meta are actively working to be welcoming to all, encourage more folks to convert to regulars, etc., but I just felt a need to say something... Feel free to downvote into oblivion if you disagree. :-/