The process of mobile app internationalization is crucial for preparing an app to be released in multiple languages and cultures. This involves customizing the code to accommodate localized content, taking into account legal considerations such as data restrictions and compliance with local laws. It also requires separating content from code, using Unicode for text representation, and supporting different fonts and media formats. The process involves testing and iterating on the app to ensure that it adapts well to different locales and cultures. By doing so, developers can increase their app's global reach, expand sales, and gain a competitive edge in the market.