JS Morisset

<p>Add a user locale drop-down menu item in the WordPress admin back-end admin and front-end toolbar menus.</p>
<p>Perfect for anyone that needs to switch languages quickly and easily – allows logged-in users to change their preferred locale / language setting right from the toolbar menu (instead of having to update their WordPress user profile page).</p>
<p>The default WordPress behavior is to apply the user locale preference to the admin back-end only – this plugin extends the user locale / language preference to the front-end webpage as well.</p>
<p>There are no plugin settings – simply install and activate the plugin.</p>
<h4>Do you use the Polylang plugin?</h4>
<p>If the Polylang plugin is active, the user locale menu will automatically use the correct Polylang language URLs for the current webpage.</p>


JSM User Locale Selector

Hi, I think this plugin is really useful, stable and reliable.
I've been recommending it in the BuddyPress forum and also now in my own translation helper plugin which I designed to work with this: [link removed]
So excellent, 5 stars.

Really useful

A simple but effective plugin. The convenience of a quick admin language switcher saves precious seconds. Thanks.

Effective

Add a quick and easy user locale / language selector in the WordPress admin back-end and front-end toolbar menus.

<p>This plugin allows you to switch your WordPress installation to use any of the<br />
languages available on <a href="http://translate.wordpress.org" rel="nofollow ugc">GlotPress</a></p>
<p>Some of the features:</p>
<ul>
<li>No gettext compiler required!</li>
<li>Does all the dirty work from editing <code>wp-config.php</code> to downloading the right files</li>
<li>Can switch between versions. Available: stable and dev</li>
<li>Uses GlotPress api!</li>
</ul>
<div class="embed-vimeo" style="text-align: center;"><iframe loading="lazy" src="https://player.vimeo.com/video/19433386" width="750" height="422" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>


Localize WordPress

Easily switch to any localization from GlotPress

JSM User Locale Selector vs Localize WordPress