changing the language of error message in required field in html5 contact form

Question

I am trying to change the language of the error message in the html5 form field.

I have this code:

Answer 1

I know this is an old post but i want to share my experience.

HTML:

Javascript (jQuery):

$('input[required]').on('invalid', function() {
    this.setCustomValidity($(this).data("required-message"));
});

This is a very simple sample. I hope this can help to anyone.