Is there any way of blanket tagging an entire group? For example if I come across an entire untranslated pool and want to mark every one translation_request without going to all 100 pages.
mass-tagging isn't possible unless it's implicated or aliased and even then it doesn't do what you would like. I can mass edit tags or mass-tag stuff via the DB, but from an UI perspective no such thing exists.
If you want to give me a group I can look into tagging it via a DB update.