This plugin allows you to easily insert a wide variety of links into your wordpress documents with the following tag style:
[ln wikipedia]topic[/ln]
[ln php]htmlentities[/ln]
[ln amazon]978-0321396853[text]Eclipse Web Tools Platform[/text][/ln]
Or you can add links by clicking the ‘ln’ button inside of the wysiwyg editor. This will bring up a dialog box where you enter in the necessary data for that particular link
New link types can be easily added and existing links can be easily modified from the wordpress options page.
The following types of links are currently supported by default (with more on the way):
<ul>
<li>amazon</li>
<li>gravatar</li>
<li>php</li>
<li>twitter-rss</li>
<li>wikipedia</li>
<li>wppost</li>
</ul>

linkle

Easily embed links to wikipedia topics, amazon book sales, php documentation, and more with [ln linktype]topic[/ln].

flashpixx

The plugin is a Wikipedia plugin, for setting links to Wikipedia articles. The language and the description for every link can be set individually.
<h3>Requirements</h3>
<ul>
<li>WordPress 3.2 or newer</li>
<li>PHP 5.3.0 or newer</li>
</ul>
<h3>Shortcode</h3>
Add to your content of a page or article
<pre>[[search tag]]</pre>
Another way for using the Wikipedia call, is to use the additional syntax
<pre>[[ article | view ]]</pre>
creates a link to the article and within the content the view text is shown
<pre>[[ language | article | view ]]</pre>
creates a link to the article with the language and within the content the view text is shown

Reference 2 Wiki

Creates links to Wikipedia with different languages

linkle vs Reference 2 Wiki