Description of problem:
All of detailed information is available on my post at the fonts list:
binding="same" in the fontconfig config file prevents to apply the rule for the
language only properly. As a result, fonts is used for non-targetted languages
and it may gives different look and feel in some cases.
I'd propose to get rid of binding="same" from:
It seems this is a false positive - this font does not use any lang-specific binding
Ah, right. the checker had a bug. sorry for that.