Once every couple of days, my htaccess file gets rewritten and adds language folder /en to lines 211 and 218 of the image i joined, I found this post on your site and this seems to be the same thing: https://wpml.org/errata/htaccess-is-rewritten-with-language-folder/.
Is this answer still relevant? I know there's a code i can paste that is supposed to be a workaround, but i can't recreate the bug where it gets rewritten so i don't know how to deduce if the code on that page is working. It always happend when we are working on the backend of the site, that much I can say. Can you help me figure this out?