Rick Curran

<p>WordPress 5.9 added a new language selector to allow users to switch languages from a dropdown on the login screen if more than one language is enabled on your WordPress installation. This plugin provides a quick and easy way to prevent this language selector from appearing.</p>
<p>It is a very simple plugin which is provided for ease of use: you need only to install and activate the plugin and it will prevent the language dropdown from appearing on the login screen of your site.</p>
<p>Alternatively, you can also achieve the same effect by adding the following line of code to the <code>functions.php</code> file in your theme:</p>
<pre><code>add_filter( 'login_display_language_dropdown', '__return_false' );
</code></pre>


Disable Login Language Selector

Remove the language selector from the login screen if you have more than one language enabled in WordPress 5.9 and later.

Katsushi Kawamori

<h4>Automatically switch the locale according to the locale of the browser.</h4>
<ul>
<li>Can specify multiple locale of browser.</li>
<li>Can import and export browser locale and WordPress locale configuration file with CSV.</li>
</ul>


Locale Auto Switch

Automatically switch the locale according to the locale of the browser.

Disable Login Language Selector vs Locale Auto Switch