Chinese translations exist in the database (ai_playerbot_texts.sql, column text_loc4), but there's a bug: bots never register their locale. In PlayerbotMgr.cpp, the HandlePlayerBotLoginCallback() function needs to call sPlayerbotTextMgr->AddLocalePriority(botLocale) after creating the bot session, similar to how OnPlayerLogin() does it for real players. See issue #1884 for tracking. The translations were added by @sd3420625 and cover 900+ messages.

And nicknames should also be created according to the region's language settings...

thanks , i will close this issue ..