How can I translate “The number you entered is out of bounds.” message on the numeric input fields?
Because it’s a property, we don’t translate it for you. But you can bind it to an expression that translates it.
Hm… now I don’t understand…
On other components, where you translate properties that contains text, it’s working…
I wouldn’t be surprised if we’re inconsistent. 
But our overall goal for translation is we should automatically run all text that is visible in the client and that you don’t have control over through translation. All text you do have control over we let you translate if desired.