It is commonly used on German realms.

You can add your own keywords. Just check dungeons.lua file and edit it accordingly.

ClassicLFG.DungeonManager:DefineDungeon("Hellfire Ramparts", "TBC", 5, 58, 70, "Hellfire Peninsula", "RAMPS", {"ramps", "ramparts", "ramp"}, ClassicLFG.Faction.BOTH, "Interface\\LFGFRAME\\UI-LFG-BACKGROUND-HELLFIRECITADEL")

This is not a solution, since it needs knowledge

• where to find
• how to open
• this modification get lost by the next addon update

Its a workaround. This way you don't have to wait until the developers do it. Better than nothing. lol

What is wrong with germans ? But sure.

Would it be not a good idea to allow to modify the dungeon keywords?
so that locals own logic can be implement by the users.