Hello I'm native Chinese currently working for some Hard Drive maker as Japanese Customer Service, I know how to install new OS into Hard Drive, also how to switch PC languages between Chinese, English and Japanse it is no problem for me to help you install or turn your OS language into English. As for your android phone, I think a newly installation will do. (fully English system).
Kindly let me know which way you prefet to contact you, phone, skype, email etc.. by the way I'm in Shanghai, China, UTC+8.
Regards,
Jindan