And I learned that it's nyan in Japanese (https://en.wikipedia.org/wiki/Cross-linguistic_onomatopoeias https://en.wikipedia.org/wiki/Cross-linguistic_onomatopoe

And I learned that it's nyan in Japanese (https://en.wikipedia.org/wiki/Cross-linguistic_onomatopoeias https://en.wikipedia.org/wiki/Cross-linguistic_onomatopoeias), quite different from other languages! Also Korean has yeong and Indonesian meong. These sound like they developed independent of the Chinese one.