unclego

Lets you have your backend administration panel in english or any installed language, even if the rest of your blog is translated into another language. Language preferences can be set per user basis in user profile screen.
Tested on MultiSite.
Deals with frontend ajax requests
Notice: 
After release of WordPress 4.7 this plugin is a bit obsolete.
In WordPress 4.7 users are able to select their preferred locale (language) when editing their profile. Plugin add exact same functionality to pre 4.7 WordPress.
I still maintain it for people with outdated WordPress sites. And the plugin is still usefull for sites with outdated plugins that not obey get_user_locale(). 
<a href="https://make.wordpress.org/core/2016/11/07/user-admin-languages-and-locale-switching-in-4-7/" rel="nofollow ugc">More info</a>

Admin Language Per User

a must have for multilingual sites

Switch your backend administration panel in any installed language per user basis.

Karolina Vyskocilova

The lightweight plugin extends the default WordPress functionality (user settings in Profile) and pulls out the language selection to the admin bar so you can easily switch between them.
Do you want help with the development? Join the <a href="https://github.com/vyskoczilova/Simple-Admin-Language-Change/" rel="nofollow ugc">Github</a>!

Simple Admin Language Change


A simple yet very needed plugin in none English sites. Works perfectly and right to the point. Thank you.


Right to the point


I was looking for a plugin like Plugin Toggle but for languages, and this one was exactly what I needed. It works perfectly for testing multilingual sites. Thank you, @vyskoczilova, for creating such a great plugin! 🙌


Perfect tool for testing multilingual sites

Change your dashboard language quickly and easily from the admin bar as often as you need.

Admin Language Per User vs Simple Admin Language Change