With things you don't want to do, you make it concise with a whitelist. Like 'we only use these 2 languages for our backend and here is why:'. If you have th

With things you don't want to do, you make it concise with a whitelist. Like 'we only use these 2 languages for our backend and here is why:'. If you have the authority to tell people no in the first place to make it stick, you have the ability to write that in a wiki page. You can go full FAQ mode for the miscellaneous stuff as it comes up. Documenting the why is really important, so you don't get zombie decisions self perpetuating in your org and allow for change.