dynamic languages changeable by CDN

Hi, I am looking for advice on how to setup the localization for my project.
I want to:
- Have different scenes that are loaded by addressable assets
- Download only the text/audio files for the selected language
- Be able to dynamically add new languages via updating the buckets without the need to update the main app

My current status quo is:
- Have a language source in each scene
- I have all language files (audio files) as part of the scene

What is the best approach?
Approach 1:
- Remove the audio files from the scene and make a separate language/scene package?
- Do I need to separate the language source file as well? Do I need to make a separate source file for each language?
Approach 2:
- Do I need to create “dummy” languages and change their bucket once I have the content?
- How do I tell an app store which language is really included (and not a dummy)?

Sorry for the naïve questions! I am still unfamiliar with your tool and it seems very complicated to achieve my goals.