locale.css

.zh-CN {
  font-family: '方体', 'PingFang SC', '黑体', 'Heiti SC', 'Microsoft JhengHei UI',
    'Microsoft JhengHei', Roboto, Noto, 'Noto Sans CJK SC', sans-serif !important;
}

.zh-TW {
  font-family: '方體', 'PingFang TC', '黑體', 'Heiti TC', 'Microsoft JhengHei UI',
    'Microsoft JhengHei', Roboto, Noto, 'Noto Sans CJK TC', sans-serif !important;
}

.ja-JP {
  font-family: '游ゴシック体', YuGothic, 'ヒラギノ丸ゴ', 'Hiragino Sans', 'Yu Gothic UI',
    'Meiryo UI', 'MS Gothic', Roboto, Noto, 'Noto Sans CJK JP', sans-serif !important;
}

.ko-KR {
  font-family: 'Nanum Gothic', 'Apple SD Gothic Neo', 'Malgun Gothic', Roboto, Noto,
    'Noto Sans CJK KR', sans-serif !important;
}

.ar-SA {
  font-family: 'Geeza Pro', 'Arabic Typesetting', Roboto, Noto, 'Noto Naskh Arabic',
    'Times New Roman', serif !important;
}

.he-IL {
  font-family: 'New Peninim MT', 'Arial Hebrew', Gisha, 'Times New Roman', Roboto, Noto,
    'Noto Sans Hebrew', sans-serif !important;
}