Hello!
So, it seems like the sprites I edited for my translation forbid my game from running once I upload it. At first I thought it had something to do with the translation files, but in the end it was actually the sprites. In fact, now that I uploaded a translated version with the unedited sprites, it works.
Does someone have any idea why this happens? I simply used Paint (lol I'm no designer, and this way sounded the easiest to me) to edit them; then I moved them into the proper folder without changing the name of the file nor the extension.
Thank you :)