You can download all available languages for free then follow the below instructions to install them into your mooSocial site.
Download all available languages
How to Install language
- Unzip the languages.zip (downloaded from link above)
- Upload app folder from extracted languages folder to your app folder on server
- Goto Admin Dashboard >>> Site Manager >>> Languages Manager
- Choose tab Not install Languages
- Choose language you want to install and click install
- Go to Admin Dashboard >>> Clear Global Caches