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can i use this joomla language pack in my ASP.NET MVC Environment ?
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Those are language packs, that you can use in your templates. Joomla team has a web environment where you they share more information on this topic, please review that here, https://community.joomla.org/translations/joomla-3-translations.html.
Secondly, you will find all of the help there... They also share the installation methods: Go to the Install Languages in the Extension Manager and from there you can easily install the languages that you need to use in your web application.