flex-search in maltilingual site

[roheclassic]

flex-search appears to search only for content in the primary language (only one language) in multilingual site.
And the primary language seems to be determined by weight in language.toml.

Can I have flex-search match the display language?

[h-enk]

Would be part of multilingual improvements; I've create issue #790

[roheclassic]

Thanks!