Excuse me I will ask also this:

In the country that I m currently living there is no Nostr relay.

How to set up one so there are notes only in the native language, I mean can be "IP specific" relays?

Are there any services to "provide" this setup and are there any ready made filters to exclude porn material for example or if I set one relay I have to check every note myself? If this is how it's working. I don't really know.