Vocabla

It lets your international visitors translate English words using double click. 
8 languages are covered: Spanish, Portuguese, Chinese, Arabic, Russian, Turkish, Vietnamese, Polish. 
Other users get English definition.
After installation no additional setup is required. It just works:
<ol>
<li>Box with one line instruction for users is presented below every post title:</li>
</ol>
“New English word? Translate any word using double click.”
<ol>
<li>
When user double-clicks on an English word in your article, he gets word translation in his browser’s language or an English definition.
</li>
<li>
That’s all! More international visitors can understand articles from your website 🙂
</li>
</ol>
<h3>Loading JS from http://vocabla.com</h3>
To provide the best service of translation, we need to communicate with Vocabla servers where we keep the translation data and audio for the translated words.
<h3>Arbitrary section</h3>

Translate English Words by Vocabla

It lets your international visitors translate English words using double click.

dgamoni

MyQtip for WordPress is a plugin that uses qTip2 to display nice looking, user friendly tooltips. You can choose from 12 color style. Position easily changeable. For use – paste shortcode [myqtip title=’my text tips’ ] any content [/myqtip] or add .myqtip class for link or other tag. Text tips is taken from the title attribute
Online Demo :
<a href="https://myqtip.monothemes.com/" rel="nofollow ugc">https://myqtip.monothemes.com/</a>
The plugin was created in 2013 year
MyQtip this is plugin for WordPress, based qTip2 jQuery plugin

MyQtip – easy qTip2

Great work!

MyQtip for Wordpress is a plugin that uses new qTip2 jQuery plugin to display nice looking, user friendly tooltips.

Translate English Words by Vocabla vs MyQtip – easy qTip2