For a text box dedicated for numbers (using NSD_CreateNumber), if the user happens to type non-numeric characters, an error message pops-up in the form.
The problem is that this error message is displayed with OS language and not with the language configured for the wizard.
Is there a way to customize this message or its idiom?
This message appears in standard edit boxes with the ES_NUMBER style on WinXP+ and NSIS does not really have anything to do with the popup.
The only way to display a different message would be to write your own NSIS plugin that subclasses the edit box and displays it's own popup...