Resources for Shortened words for names of countries, languages
<p>I would like to know where i can find the resource for some shortened words for languages such as 
"en" for "English", "cn" for "Chinese", etc and those for countries such as "ja" for "Japan", "vn" for "Vietnam" etc. </p>

<p>If there is such a resource for me to look up to , how can I change it into corresponding language or country name ?</p>

<p>Thank you so much in advance.</p>
