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

Do it using JS. Grab the class of the error message, and change it's content for whereever it appears.

var myClasses = document.getElementsByClassName("wpcf7-not-valid-tip");

for (var i = 0; i < myClasses.length; i++) {
    myClasses[i].innerHTML = "Bitte füllen Sie das Pflichtfeld aus.";
}