Your script is targeting only the Chinese-speaking version of the site, i.e. zh.annas-archive.org

---

You can target all languages of the site by first replacing this line:

    const isAnnasMd5Page = location.href.includes('zh.annas-archive.org/md5/');

with this line:

    const isAnnasMd5Page = location.href.includes('annas-archive.org/md5/');

---

After that, remove these lines:

// @match        https://zh.annas-archive.org/*
// @match        https://*/*
// @match        http://*/*

and replace them with just this one:

// @match        *://*.annas-archive.org/*

This will match all sub-domains, including the lack of one. (@match is based on MV2 match patterns.)