Just release a setup tools
https://board.eclipse.cx/viewtopic.php?t=383
If you want diy by youself:
1. unpack [omni.ja] and [\browser\omni.ja] in Baslisk`s directory
2. copy files in language pack to unpacked dirctory
chrome --> omni.ja (\chrome)
browser\chrome -> \browser\omni.ja(\chrome)
3. modify files omni.ja (\chrome\chrome.manifest) and \browser\omni.ja(\chrome\chrome.manifest)
replace 'en-US' to 'language id' you copied in. e.g: zh-CH, pt-PT
4 pack again use cmd console with command:
zip -9DXqr omni.ja *
5 replace the omni.ja and \browser\omni.ja
6 delete %appdata%\Moonchild Productions\Basilisk
7 about:config -> modify "general.useragent.local" enter you [language ID]
done!