dtonon on Nostr: Language filtering is nice (even if not standard), but also Ditto fails by basic ...

Language filtering is nice (even if not standard), but also Ditto fails by basic test:

quoting nevent1q…gz33

The implementation of NIP-50 is usually fine, I think. The main problem is that clients do not use it, and the custom search approaches are rather inaccurate.

My basic test is searching myself by display name (since it's more common), adding a word from the bio; using the name (that on Nostr is not unique, of course), plus an additional keyword should be a basic way to find someone. Example:
nak req --search "daniele gossip" -k 0 wss://......

Results:

relay.nostr.band: found
nostr.wine: found
relay.noswhere.com: error
search.nos.today: zero results

50% success, not exceptional.

Let's see how the search for "daniele gossip" works in some clients:

Coracle: zero results
Nostrudel: found
Snort: found a note, not the profile
Primal: found a note, not the profile
Habla.news: found a note, not the profile
Gossip: zero results
Amethist: zero results
Voyage: zero results
Nostur: zero results
Damus: not found

10% success, disappointing.

Some clients work better with a single world ("daniele"), but it's just a casualty, since a single keyword is often meaningless without a context or a proper sorting.
Weight fields, proximity or fuzzy full text search are still science fiction.

I will do more tests.