The MO Cache provides simple and fast caching of the translation MO files using the <a href="https://codex.wordpress.org/Class_Reference/WP_Object_Cache" rel="nofollow ugc">WP Object Cache</a> mechanism. 
This plugin is necessary to be used <a href="https://codex.wordpress.org/Class_Reference/WP_Object_Cache#Persistent_Cache_Plugins" rel="nofollow ugc">persistent caching plugin</a>, 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.
<a href="http://m4i.hatenablog.com/entry/2011/12/10/000407" rel="nofollow ugc">Description in Japanese （日本語での紹介記事）</a>
<h4>Features</h4>
<ul>
<li>No configuration</li>
<li>Supports multiple languages</li>
<li>Supports plugin’s translation files caching</li>
<li>Supports WordPress Network/Multisite installation</li>
<li>A simple plugin in less than 100 lines</li>
</ul>

MO Cache

Simple and Perfect solution.

Improving the site performance by caching translation files using the WordPress standard cache mechanism.

shra

This plugin caches web requests and stores static html code. You can configure what urls do not to cache, what user shouldn’t be cached and ect.
After first web request plugin will create a cache of this requested webpage, and on second request your webserver will serve static html code instead of processing the comparatively heavier and more expensive WordPress PHP scripts.
It has some options to drive caching process.
You can:
<ul>
<li>… define filter by regular expressions pattern to exclude 
necessary urls from cache.</li>
<li>… fill user’s list to define who will not cached.</li>
<li>… do cache only for anonymous users.</li>
<li>… forcing rebuild cache on page/comment updating.</li>
<li>… setup cache timing.</li>
<li>… activate server confing boosters.</li>
</ul>
and etc.

Alpha Cache

Simple caching plugin that works on my WooCommerce store with standard settings.

Works

Caching plug-in. Easy to setup, free to use and fast in action.

MO Cache vs Alpha Cache