I looking for a report or dashboard that allows me to see what is the default user language, so we can report this to the Local government .
Iโm pretty sure you can do this with the free, open source, command-line, indispensable GAM tool. Check out:
for more details.
For the specifics of which command to run, Iโd suggest asking this question on the GAM mailing list above.
Hope that helps,
Ian