Starting from version 7.0 (Nougat), Android offers the ability to select multiple languages, which enhances the experience for bilingual users, especially those who prefer languages other than English.

However, some manufacturers have not implemented this functionality on their devices, for example Xiaomi (MIUI 10) and Oppo (ColorOS 5). This app allows users of such devices to select more than one language. In addition, just like any other language-changing apps, it allows users to add unsupported languages.

Normally, only system apps are allowed to change the system language. Therefore, you'll need to grant this app special permission using a computer.