It sounds like you're describing an app that uses AI to instantly translate your messages into a second language as you type them, offering convenience and adaptability. This type of app could have several key features:

1. Real-Time Translation: As you type, the app would provide an instant translation of the text into the second language of your choice.

2. AI-Powered Suggestions: The app could use AI to understand context, offering suggestions for more natural-sounding sentences or different ways of phrasing.

3. Language Detection: The app might automatically detect which language you're typing in and switch the translation accordingly, for an even more seamless experience.

4. Customizable Languages: You could set up the app to translate into multiple languages, adjusting the translation settings whenever you need.

5. Voice-to-Text: It could include speech-to-text functionality, so that your spoken words get translated as well.

6. User-Friendly Interface: Simple, intuitive UI with options to quickly toggle between languages, enabling effortless communication.

This app would be ideal for people learning a second language or those who frequently communicate in different languages.