i18n robot is an intellij/android studio plugin that can auto translate you and project into other languages. 18 languages supported current now.
If you want translate your project manually, you can lookup the translation through 'app i18n translation' site i18ns.com. It's already collected over 10 millions i18n strings.
Perhaps by choosing to reuse good translation examples on i18n.com, you can do a good job of internationalizing the project.