The appeal of iOS is global – iOS users live in many countries and speak many languages. You can ensure that your application is ready for a global audience through the processes of internationalization and localization.
Internationalization is making sure your native cultural information (like language, currency, date format, number format, etc.) is not hardcoded into your application. Localization is the process of providing the appropriate data in your application based on the user’s Language and Region Format settings. You can find these settings in the iOS Settings application (Figure 7.1). Select the General row and then the Language & Region row.
Figure 7.1 Language and region settings