[Fontconfig] Set font used for certain language

[Haiku Konaru]

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Hello list, my problem is that I want to use certain font
for DE. Anything is okay as-is except monstrous Cyrillic
because this font is intended for Japanese language. Taking
a quick look at font-conf man page I added this rule to my
user config:

<match target="font">
     <test name="lang" compare="contains">
          <string>ru</string>
     </test>
     <test name="family" compare="contains">
          <string>IPAMonaPGothic</string>
     </test>
     <edit name="family" mode="assign">
          <string>Arial</string>
     </edit>
</match>

Which did nothing however. Did i misunderstood language test
or something?
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