I think he is talking about the localization of code itself (in the case of Android, the Java that the app is written in), not the localization of the user inte

I think he is talking about the localization of code itself (in the case of Android, the Java that the app is written in), not the localization of the user interface element, etc. that the user sees. Imagine a programming language in which the keywords, for example, could change based on the user's language settings.