The best programming languages for augmented reality app development depend on the AR platform and frameworks being used. For AR development on Android using ARCore, Java or Kotlin are commonly used languages due to their compatibility with Android development.
Additionally, languages like C# are popular for AR development using Unity, a cross-platform game engine. JavaScript and TypeScript are also used for web-based AR experiences. In the end, the most suitable language depends on the specific requirements of your augmented reality app development.