Languages section allows you to add a language instance. Any calls routed into/through a language instance will have the language of the call's channel changed, playing the language's sounds if installed.
To access the Languages page, do the following:
When making a new language instance, you would want to give it a descriptive name.
You would then select the language you would like the call's channel to be changed to.
Lastly, you would select where the call is routed/how it is handled after the language change has been made.
Save the new Language instance. (using S.A.C - Submit, Apply, Continue)