Changing client locale for ONLY yell purposes

[abigale]

I raid with people that play on US but are from another country and I'm trying to trick the getlocale to appear in another language versus english.

I need to do so that the client stays in english (as i'm american) but it pulls another locale so that the addons yell in-game in the language I need.

I tried using

local GetLocale_Old = GetLocale();

function GetLocale()
	return "ruRU";
end

And setting it in addons but that only changed the display text of verious addons such as Skada, Details, and WorldQuestFinder - it did not change any addons with yell privileges, such as interrupter nor dbm.

Thanks in advance for any help.