As the figure, my task can receive tasks, and then go to the target NPC, but will not complete the task, I would like to ask how to set?

Why does the translation file not work?

There is a wqy after interracting to click a button in menu but can't remember like now where it is. 

Dunno about the translation file

Hello, http://www.wowhead.com/quest=28784/join-the-battle is a very basic quest, you just need to use "pickup" and "turnin" step.

For the translation, check with the 'tranlate tools' (tab "Tools") if all texts are translated. If yes, can you share your log and translate file please.