I don't know a bit of French, or Japanese. But I do know that there are a awful lot of English translations, done by well-meaning people, which vary from mediocre to Godawful. Almost every anime subtitling job I've ever seen is at the very least somewhat stilted and awkward to my ear. (Though they're still better than the dubs.) And a lot of it comes down to native English speakers who fear losing the intended nuances of the original and so do a rigidly literal translation, because they think that's the "most accurate."

So the problem isn't nitpicking; it's the wrong kind of nitpicking. If you think you can do a translation by following a rulebook and wave off dissenters as "nitpickers," you are probably going to do a shitty job, and have no idea why.