The support account suggested to create a feature request to have AppleScript added to the list of languages, one can choose for a repository. The list I'm talking about: repository > Settings > Repository details, and then Language-dropdown.
I'm not sure what kind of functionality is behind an item in the list. For me it would be nice to distinguish between Python and AppleScript repositories.
As an extra argument to add AppleScript; I made a filter so one can use AppleScript more easy with git: https://github.com/doekman/osagitfilter