TYPO3 Core

If the language field (setup.fields.lang.disabled = 1) is disabled/hidden, it will become empty when clicking on 'Save Configuration'.
Which means the language will be english.
If I then click at 'Reset Configuration and Clear Temporary Data', it will return back to the default setting of the user again (which could be set on the user).

I have tried to experiment with setup.default and setup.override, but it doesn't seem to have an effect when the field is disabled.