Rather than having selections for multiple languages (for each task) it seems like language detection or a selection/setup screen would be best. With fallback, to english, or whatever your default is. Maybe use online translations services?
edit: Oh it seems you do have a language drop down, but there are still multiple languages appearing in quests... this just means more quests I guess eh :)
edit: Oh it seems you do have a language drop down, but there are still multiple languages appearing in quests... this just means more quests I guess eh :)