The system language might not be updated yet (it will be), but that shouldn't prevent you from submitting the images. I'll check with the team, but if you're having issues submitting the images, please make sure that you've entered all of the necessary metadata fields and categories.
I'll double-check with the team in the meanwhile that these specific alerts don't prevent submission (although - to be clear - our alerts for insufficient metadata do prevent submission).
Best,
Scott