Not sure. Maybe @brugeman has this feature?
There is a relay for that, wss://feeds.nostr.band/lang/{lang} - en, es, jp etc., i.e https://nostrrr.com/relay/nrelay1qq08wumn8ghj7en9v4j8xtnwdaehgu3wvfskuep0d3skuee0v4esg0z4rx
multilingual relay support 🔥 nostr:nevent1qqs9alndgw2kls8ef0vezm0rzwlzz7dxsa94np6umvv0wmrl02jl56spzemhxue69uhkzarvv9ejumn0wd68ytnvv9hxgq3qxdtducdnjerex88gkg2qk2atsdlqsyxqaag4h05jmcpyspqt30wsxpqqqqqqzc9h9yp