Not app, but nostr-filter-relay can do this

You can test it by using relays with parameters:
wss://nostr-id-relay.hf.space/?lang=en,ja&lang_confidence=50

as example to get English and Japanese notes only.

Parameters usage documented in Github nostr:npub1zafcms4xya5ap9zr7xxr0jlrtrattwlesytn2s42030lzu0dwlzqpd26k5