I'm Software Test Engineer and have 3+ years of experience. Still I haven't done any localization testing. As far I can guess, a tester should know the language to test the application for that specific language.(Correct me here if I'm not correct about localization testing assumption.)
As I can see, many applications are mostly localized to languages like: Chinese, Japanese, French, Spanish, Portuguese, Korean.
Can you suggest which of the above languages would be best for my software test career for me to learn?
Also let me know if learning one of the above languages is really worth to make your profile much better as Software Test Engineer.