user11692: In Islamic quran, we Muslims are asked to know people from other nations and following other religions, we are recommended to learn their languages. Allah said: "O Mankind, We have created you from a male and a female, and made you into peoples and tribes that you may know one another." Is there any recommendations in the Buddhism that tells the same? especially for languages learning?

user295: 
...
You should not cling to a regional language; you should not reject common usage.
This is a summary of the analysis of non-conflict.

Arana Vibhanga Sutta
A lot more discussions in Language and Discourse by Piya Tan

11692: <p>In Islamic quran, we Muslims are asked to know people from other nations and following other religions, we are recommended to learn their languages. Allah said: "O Mankind, We have created you from a male and a female, and made you into peoples and tribes that you may know one another." Is there any recommendations in the Buddhism that tells the same? especially for languages learning?</p>
 295: <blockquote>
<p>...</p>
<p>You should not cling to a regional language; you should not reject common usage.</p>
<p>This is a summary of the analysis of non-conflict.</p>
</blockquote>
<p><a href="http://www.themindingcentre.org/dharmafarer/wp-content/uploads/2009/12/7.8-Arana-Vibhanga-S-m139-piya.pdf" rel="nofollow noreferrer">Arana Vibhanga Sutta</a></p>
<p>A lot more discussions in <a href="http://www.themindingcentre.org/dharmafarer/wp-content/uploads/2009/12/26.11-Language-and-discourse.-piya.pdf" rel="nofollow noreferrer">Language and Discourse</a> by Piya Tan</p>
