CSS rule that scales text of any content using arabic-script. Works with an exaustive list of languages that use arabic-based scripts or have arabic-script varients.

resize-arabic.css

/* scales-up any text using arabic-script for improved legibility  */
*:is(:lang(ar), :lang(fa), :lang(fa-AF), :lang(tg), :lang(ur), :lang(ps), :lang(ckb), :lang(ug), :lang(ks), :lang(skr), :lang(bal), :lang(sd), :lang(ota-Arab), :lang(kk-Arab), :lang(ky-Arab), :lang(az-Arab), :lang(tk-Arab), :lang(uz-Arab), :lang(pa-Arab), :lang(ms-Arab), :lang(tt-Arab), :lang(ha-Arab), :lang(ff-Arab), :lang(kr-Arab), :lang(wo-Arab), :lang(bm-Arab), :lang(tmh-Arab), :lang(yo-Arab), :lang(ig-Arab), :lang(sw-Arab), :lang(so-Arab)) {
    font-size: 1.2em;
}

/*
Languages supported:

    ar - Arabic
    fa - Persian
    fa-AF - Dari (Afghan Persian)
    tg - Tajik
    ur - Urdu
    ps - Pashto
    ckb - Central Kurdish
    ug - Uighur
    ks - Kashmiri
    skr - Saraiki
    bal - Baluchi
    sd - Sindhi
    ota-Arab - Ottoman Turkish (Arabic script)
    kk-Arab - Kazakh (Arabic script)
    ky-Arab - Kyrgyz (Arabic script)
    az-Arab - Azerbaijani (Arabic script)
    tk-Arab - Turkmen (Arabic script)
    uz-Arab - Uzbek (Arabic script)
    pa-Arab - Punjabi (Shahmukhi script)
    ms-Arab - Malay (Jawi script)
    tt-Arab - Tatar (Arabic script)
    ha-Arab - Hausa (Ajami script)
    ff-Arab - Fula (Ajami script)
    kr-Arab - Kanuri (Ajami script)
    wo-Arab - Wolof (Ajami script)
    bm-Arab - Bambara (Ajami script)
    tmh-Arab - Tamashek (Ajami script)
    yo-Arab - Yoruba (Ajami script)
    ig-Arab - Igbo (Ajami script, hypothetical as Igbo traditionally does not use Arabic script)
    sw-Arab - Swahili (Arabic script)
    so-Arab - Somali (Arabic script)

*/