The situation in English is a bit more complicated though. We have words of Norman French or Latin origin that contain gender information, like actor vs actres

The situation in English is a bit more complicated though. We have words of Norman French or Latin origin that contain gender information, like actor vs actress, and then we have the ending -er that is of Germanic origin, and we can use that to make new words. I don't believe the French/Latin endings are "productive" in English: you can't really make up new words that have those endings, but you can readily make new words from verb + er (and I suppose in old English and its ancestors there must have been a feminine version of -er, like Dutch -ster and German -erinn, but we lost that along with all kinds of case endings and so forth a very long time ago). That's because we imported the "foreign" words as whole atoms when we bolted Norman lexicon on top of our Germanic grammatical base, and perhaps we've mashed them around a bit, but they're not really composed of phonemes that we can work with individually in quite the same way as we can with Germanic words. Those are the ones that some people are trying to kick out of the English language, with the idea that "actress" is somehow inferior or has connotations other than just gender, or that marking gender is unnecessary, and it's natural to get rid of them by analogy to our more Germanic words. But those types of endings are entirely productive in French -- they're in the toolbox of living phonemes you can make new words with, bolting on -eur, -rice/-euse/-resse etc (though I'm never sure to choose among those...) So it makes sense that French speakers are trying to "fill out" the missing logical combinations of gender-marking endings, and the English speakers are trying to "remove" the unnecessary variations that we see with just a few of our words. Perhaps someone who objects to "actress" should argue for "acter" instead of using the masculine ending "actor"! (Not a serious suggestion, just a shower thought really, as someone who's spent a bit of time in English and French speaking countries...)