Here's a really interesting talk (in Spanish) about programming in one's (natural) language: https://www.youtube.com/watch?v=cZ2ZGNUqWXg
In fact, what's popular now is to do just the opposite: linters and formatters which force the same coding style for everyone, which is way easier to implement for all the different languages and way more reliable.
And as far as the language itself is concerned, I'd say that it is a bad idea as well because of context switching, translating what you type into other languages (which is not a trivial task for both machines and humans) and because, as I said above, you still need a good english proficiency level if you want to be a good developer, so it makes sense to prepare your students for the real world by teaching programming in english and getting used to it.