lg mp4

please help! a friend of mine ask me to fix her mp4.,an lg mp4.,what i did is i reformat it.,just like what im doing with my mp4 everytym it is having a problem.,now i dont know why its not charging anymore.,i put some mp3 files and its not playing.,now i went to setting and i went to default setting and i press “YES”.,now its in chinese language.,help me.,how can i put it back into english again.,please send me an email to u_nenita@yahoo.com.,thank u