Mobile applications can be written in many programming languages, such as:
- Java: This is a programming language that is widely used to write Android applications.
- Swift: This is a programming language created by Apple to write iOS applications.
- Kotlin: This is a JVM-based programming language that is increasingly being used to write Android applications.
- React Native: It is a JavaScript-based framework that allows you to write mobile apps for iOS and Android.
- Xamarin: It is a framework based on .NET that allows you to write mobile applications for iOS, Android and Windows Phone.
The choice of programming language for a mobile application depends on many factors, such as the developer's experience, project requirements and target platform. In any case, it's important to understand the functionality and limitations of each language in order to choose the best one for your project.