I am trying to get the text string for the "Field entry validation" paramater of the username field to be multilingual as is the rest of my CB setup. However, it does not seem to be looking to the language definition files? I put the text "_UE_NOT_VALID_INPUT" in the input box labeled "Error in case of invalid input:" when I edited the field paramaters. And I put the corresponding definition in my language files. However, the message that comes up on the front end simply shows: _UE_NOT_VALID_INPUT.

Is it possible that these kinds of messages cannot be mulitlingual?