@Michael 🇺🇦 I see that in the Admin Panel, Sites, Message Relay, I can set "Number of languages for the language detection" and "Language Quality" and the description reads as if the relay filters inbound content. However, where do I set the languages for which to filter? There is no setting where I can select which languages I want to receive via the relay. Could it be that currently I only get English from all of my relays as my instance language is English?

So what we need is a) ability to configure the list of language for inbound filtering and b) filtering also, with a separate list of allowed languages per relay, filtering outbound contenct.

Where do I go to create an issue?

As to your other questions: I don't think we need Russian. In Ukraine, choosing Fediverse over mainstream networks is about equivalent to choosing to talk in Ukrainian only :). But generally, it would be good if we could configure a list of languages. As to readonly subscription, that would be a quick fix, but the Fediverse is about interaction, so it would not be a good solution.