This plugin hasn’t been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

MO Cache


The MO Cache provides simple and fast caching of the translation MO files using the WP Object Cache mechanism.
This plugin is necessary to be used persistent caching plugin, otherwise you can not benefit from this plugin.

For localized WordPress, which was newly installed, the loading time of translation files accounts for 70% of the entire processing time.
You can make this process 3 times faster by just installing this plugin.

Description in Japanese (日本語での紹介記事)


  • No configuration
  • Supports multiple languages
  • Supports plugin’s translation files caching
  • Supports WordPress Network/Multisite installation
  • A simple plugin in less than 100 lines


  • Benchmarking WordPress 3.3 ja using Xdebug profiler.


Quick Installation

  1. Verify that /wp-content/object-cache.php is installed.
  2. Install the plugin; the “Plugins -> Add New” menu in the WordPress.
  3. Activate the plugin.

Recommended Installation

It is recommended to install the MO Cache as a must-use plugin because the translation files will not be cached if other plugins load translation files before the MO Cache is loaded.

  1. Verify that /wp-content/object-cache.php is installed.
  2. Create /wp-content/mu-plugins directory, if it not exist.
  3. Upload mo-cache.php to the /wp-content/mu-plugins directory.
  4. Done! No need to activate.


Does this plugin support multiple WordPress installs?

It depends on the persistent caching plugin.
APC Object Cache Backend, W3 Total Cache and WP File Cache support it.


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Contributors & Developers

“MO Cache” is open source software. The following people have contributed to this plugin.


Translate “MO Cache” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.



  • Support WordPress 3.4


  • No change in the code
  • Fix typos in readme


  • No change in the code
  • Tested up to WordPress 3.3


  • Initial release