Tutorial for: Create VOD with multiple language audio/subtitles?

Good Day,

I am new to Bitmovin and custom Video handling.

So far, we have used Vimeo.
Simply upload the video, it envodes automatically and you get the URL for embedding.

We plan to move away from Vimeo and explore different options.
During this, we want to implement some features for the customer:

Have multilingual audio/subtitles for a single video.
The experience should be similar to amazon prime videos, where you can select a different language mid viewing.

What Options are available to create a VOD with multiple audio tracks like in this showcase:

Can we use the UI or is a code implementation required?

Is there a "get started " guide that showcases how you can create such multi-audio/subtitle videos yourself?

If we have created a stream and want to add new audio tracks or new/additional subtitles, replace existing ones,.. How does the process look like for this?