Nikolay Bachiyski

Sometimes we want the front end of our blog to be translated for the users, but keep the backend admin panel in English. Admin in English does just that.

Admin in English

Admin in English lets you have your administration panel in English, even if the rest of your blog is translated into another language.

Sergey Biryukov

Converts gettext binary message catalogs to an array of strings. Allows to save some amount of RAM on a shared hosting server. 
Works with plugin and theme textdomains as well as with the default.
Thanks to AlexPTS for the idea.

Pure PHP Localization

Лучший и, скорее всего, единственный рабочий плагин. Спасибо, Сергей

Пожалуй, лучший плагин для кеширования переводов

Converts gettext binary message catalogs to an array of strings.

Admin in English vs Pure PHP Localization