Aaron Edwards

Tired of your custom plugin and theme translation files getting wiped out every time you use the WordPress auto-updater? Install and activate this plugin and 
WordPress will look for missing translation files in the WP_LANG_DIR where you keep your WordPress translation files.
<h4>UPDATE</h4>
In WordPress 3.8 and greater this plugin’s functionality is included in core. You can put translation files in: 
* Plugins: /wp-content/languages/plugins/textdomain-locale.mo 
* Themes: /wp-content/languages/themes/textdomain-locale.mo
A free plugin by Aaron Edwards of <a href="http://uglyrobot.com/" rel="nofollow ugc">UglyRobot Web Development</a>.

Translation Preserver

A simple plugin that helps preserve your custom plugin translations through auto-updates by allowing you to put them in your WP languages folder.

Danial Hatami

It will turn WordPress , bbPress and BuddyPress into Persian ! and also enables awesome features !
<ul>
<li>
For Upgrading to 3.1 : Delete the plugin and install it again.
</li>
<li>
برای به‌روزرسانی به نگارش ۳.۱ به بالا : نخست افزونه را پاک کنید و دوباره آن‌را نصب کنید .
</li>
</ul>
<a href="http://chamrosh.ir/projects/persian-world" title="Chamrosh Studio" rel="nofollow ugc">توضیحات افزونه به زبان پارسی</a>
<h4>Compatibility</h4>
<ul>
<li>WordPress : 3.9.x</li>
<li>bbPress : 2.5.x</li>
<li>BuddyPress : 2.0.x</li>
</ul>
<h4>Features</h4>
<ul>
<li>It Translates All Part of WordPress , bbPress and BuddyPress and Twentyfourteen ( WordPress 3.8 default theme )</li>
<li>Enables Word Captions (!) </li>
<li>Enables RTL and LTR buttons [TinyMCE editor]</li>
<li>Enables Create Username containing Persian characters [Default WordPress does not allow to use persian characters in usernames]</li>
<li>Enables New Admin Typography</li>
</ul>
<h4>What’s Next?</h4>
Please try the plugin and contact me (<code>persianworld@chamrosh.ir</code>) if you encounter any bugs or have any questions or suggestions !
This plugin is part of <a href="http://chamrosh.ir" title="Chamrosh" rel="nofollow ugc">Chamrosh Studio Projects</a>

Persian World

It will turn WordPress , bbPress and BuddyPress into Persian !

Translation Preserver vs Persian World