Reverted language code changes thruout the mod

- Added EID.DefaultLanguageCode

features/eid_bagofcrafting_search.lua

@@ -57,7 +57,7 @@ end
 
 EID:AddCallback("EIDCallbacks.SEARCH_NAME_CONVERSION", function(_, searchString)
 	-- TODO : make english search inside ko_kr language setting (priotity low though)
-	if EID:getLanguage() == "ko" then
+	if EID:getLanguage() == "ko_kr" then
 		return EID.engKeystrokeToKor(searchString)
 	end
 end)