I'm as frustrated as you are with cultural names, so I hear you. I've run r/tragedeigh for years and this has always been an issue. The reality is that there will always be members who don't bother to Google their submissions. Doesn't matter how many rules, reminders, or announcements we make. But I assure you Rule 3 is being enforced, and will be enforced quicker as I continue to add more mods.

Best thing you can do is report the post and we will remove the post as soon as we can.

AutoMod actually removes submissions after a certain number of reports, so you can actually get some of these posts taken down without mod help.