Language code templates have been moved to different categories
From User talk:Bequw
Your bot removed a lot of names from Wiktionary:Etymology/language templates and I realised this is because a lot of the code templates were recategorised recently. All code templates are now in Category:Code templates, and they are further subdivided. I'm letting you know in case your bot needs to be updated.
There are some more issues on Wiktionary:Todo/etyl problems with entries being marked with 'nonexistent etymology code'. I assume it has the same cause?