How to get the short language/uriSegment from lang item?

After upgrading to Neos 2.3 my language menu doesn’t show anymore the language name respectively the uriSegment of the language.

I have used:

{item.preset.uriSegment}

in my custom Language menu template, but this does not work anymore.

I have “work around” it, by just checking the language label (e.g. “German”, etc.) in the template and then output it statically.

But how can I output again a short form of the appropriate language dynamically taken from the uriSegment property for example: de, en, and so on?

Thanks for help.