fonts-tweak-tool - a tool for customizing fonts per language on desktops using fontconfig.

fonts-tweak-tool provides users a GUI to specific their preferred font families for different languages. libeasyfc is used as the backend of fonts-tweak-tool. 
User can select preferred fonts for sans/serif/monospace/fantasy/cursive for any particular languages they choose, and user fontconfig rules will be generated to override fonts only for those languages.