Umair, currently we have provided only the English language pack as default. So if you want to use other languages on your site you may translate your site to any desired language by yourself. The best way to create a translation is to clone an existing language and modify the cloned language to fit your translation requirements.
And if you need any help with the language pack translation, it's will be better to post your question in the special Language packs forum, probably some community members already have an updated language packs.