I found this one among my browser requests to Cockpit 183:

    https://myhost:9090/cockpit/$eb66ef5b6a7928a1af12a2229110a2817e5458e8e87fcb05eb3ae789a9e4159f/*/po.js

The returned payload actually seems the negotiated content of po.js language files, concatenated!
 
I searched the docs and code but couldn't find anything about that.  Can you help me?
 
Is it considered a "stable" API?
 
Thank you,
Davide Principi