Sergey Biryukov

Allows to create users with usernames containing Cyrillic characters.

Allow Cyrillic Usernames

Allows users to register with Cyrillic usernames.

Sibin Grasic

Oblak Studio

<h3>SrbTransLatin: The BEST WordPress transliteration plugin</h3>
SrbTransLatin enables you to have both cyrillic and latin scripts on your website. Transliteration is done in-place automatically.
<h3>Features (v3+)</h3>
Transliteration features:
<ul>
<li>Website content is automatically transliterated into latin</li>
<li>Ajax calls are transliterated into latin (both JSON and HTML)</li>
<li>Your visitors can search cyrillic content using latin script</li>
<li>Selective transliteration via shortcodes – Force parts of your website to stay in cyrillic script, use custom transliteration (Gutenblocks coming soon)</li>
</ul>
Performance features
<ul>
<li>Cache plugin compatible – No reinventing the wheel. Works OOB with all the popular caching plugins.</li>
<li>SEO Friendly – no double content or SERP penalties!</li>
<li>Optimized autoloading – Plugin is PSR-12 compatible and loads the functionalities only when needed</li>
</ul>
File and Media features
<ul>
<li>Script specific files – You can have separate versions of images or other files for cyrillic and latin scripts</li>
<li>Filename transliteration – Cyrillic uploads are automatically converted to latin script</li>
</ul>
Script Selector features
<ul>
<li>Append the script selector to any menu of your choosing – Either as a dropdown, or inline</li>
<li>Selector widget – place it any sidebar you’d like</li>
<li>Custom function – Use <code>stl_selector</code> function anywhere in the code (but read the docs first)</li>
<li>Works everywhere – Plugin hooks into WordPress core transliterating your content inplace</li>
</ul>
MultiLanguage features
Tested with:
<ul>
<li>PolyLang</li>
<li>WPML</li>
<li>TranslatePress</li>
<li>qTranslateX</li>
</ul>
<h3>Documentation</h3>
If you can’t find your anwsers in the FAQ below, documentation can be found <a href="https://rtfm.oblak.studio/srbtranslatin" rel="nofollow ugc">here</a>
<h3>Authorship</h3>
Original version of this plugin was developer by <a href="https://pedja.supurovic.net/" rel="nofollow ugc">Predrag Supurović</a>. 
Plugin development was handed over to <a href="https://oblak.studio" rel="nofollow ugc">Oblak Solutions</a> in march 2020. Since then, we am the sole authors and maintainers of the plugin

SrbTransLatin – Serbian Latinisation

SrbTransLatin plugin allows you to use both Cyrillic and Latin scripts on your website.

Allow Cyrillic Usernames vs SrbTransLatin – Serbian Latinisation