Translate app to other languages

[chinchang]

Starting with japanese & Chinese as per geo usage stats. Also adding Hindi (because I can) and also Sanskrit (because that would be supercool :P)

• [ ] Japanese (Translated by -)
• [ ] Chinese (Translated by Xiang Zhou)
• [ ] Hindi (Translated by @chinchang)
• [ ] Sanskrit (Translated by Parag)
• [ ] Spanish (Translated by Christian Medina)