From the actions we did, we know that we need a process to do the localization. Localization (often abbreviated as L10n) is a further step after internationalization. It is where the actual work specific to the target market area is done. We need this process as it involves the translators who usually can't even build the application.
The previous diagram shows a very simplified L10n process. The source code is produced by the developers according to the UI design. The design could be in formal documents or mockups. During the development, the developers add text into the source code and UI files. These texts are then extracted to .po files for each language of the target markets.
Here, the translators own the files until they are fully translated. The translated files are then handed over back to the developers. The developers and testers could make a build to test. Whenever a milestone is due, the product build is created along with the translation and delivered...