在 Ubuntu 18.04 中更改特定于语言的字体不起作用

Question

我最近将操作系统从 Ubuntu 16.04 升级到了 18.04。我正在尝试更改 Ubuntu 18.04 中特定于语言的字体。

放置一个包含以下内容的配置文件/etc/fonts/conf.d/69-language-selector-fa.conf并重新加载我的设置。

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
    <match target="pattern">
        <test name="lang" compare="contains">
            <string>fa</string>
        </test>
        <test qual="any" name="family">
            <string>sans-serif</string>
        </test>
        <edit name="family" mode="prepend" binding="strong">
            <string>Vazir</string>
        </edit>
    </match>

    <match target="pattern">
        <test name="lang" compare="contains">
            <string>fa</string>
        </test>
        <test qual="any" name="family">
            <string>serif</string>
        </test>
        <edit name="family" mode="prepend" binding="strong">
            <string>Vazir</string>
        </edit>
    </match>
</fontconfig>

但我仍然得到以下输出：

╰─○ LANG=fa fc-match                                       
DejaVuSans.ttf: "DejaVu Sans" "Book"

或者

╰─○ LANG=fa_IR fc-match             
DejaVuSans.ttf: "DejaVu Sans" "Book"

或者（更新）

╰─± fc-match -a | head -10
DejaVuSans.ttf: "DejaVu Sans" "Book"
DejaVuSansCondensed.ttf: "DejaVu Sans" "Condensed"
DejaVuSans-ExtraLight.ttf: "DejaVu Sans" "ExtraLight"
DejaVuSans-Bold.ttf: "DejaVu Sans" "Bold"
DejaVuSansCondensed-Bold.ttf: "DejaVu Sans" "Condensed Bold"
DejaVuSans-Oblique.ttf: "DejaVu Sans" "Oblique"
DejaVuSansCondensed-Oblique.ttf: "DejaVu Sans" "Condensed Oblique"
DejaVuSans-BoldOblique.ttf: "DejaVu Sans" "Bold Oblique"
DejaVuSansCondensed-BoldOblique.ttf: "DejaVu Sans" "Condensed Bold Oblique"
n019003l.pfb: "Nimbus Sans L" "Regular

看来 Ubuntu 18.04 没有加载我的配置文件。顺便说一句，Vazir 字体已安装并显示在字体管理器中。