This document provides guidelines for localizing the iOS application.

1. Fork and clone this project (How-to)
2. Create a new branch, for example translate_mylanguagecode, where my mylanguagecode could be fr or it.
3. In XCode, select the root project file and go to the project panel, Info tab. Find the localization section and click the + button to add your desired language. Then select all the resource files in the list (including the .html files).
4. A copy of each file has been created for the new language. You can now start the translation work proper.

Some content is dynamic: a part of it will contain a dynamic value, such as an amount, that will be injected by the application at runtime. In that case, these strings will contain a special data formatted like this: %@, %s, %1$... This part must not be translated.

See here.