Language override https://img.en25.com/i/livevalidation_standalone.compressed.js

We use the following script to validate a form field before submitting:

<script type="text/javascript" >

var field0 = new LiveValidation("field0", {validMessage: "", onlyOnBlur: true});

field0.add(Validate.Format, {pattern: /^[ ]*([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})[ ]*$/i, failureMessage: "Bitte geben Sie eine gültige E-Mail-Adresse ein."});

field0.add(Validate.Presence, {failureMessage:"Bitte geben Sie eine gültige E-Mail-Adresse ein."});

</script>

As you can see we use German to return if an email is not present or valid. This works fine, but after a successful submit the user is shown "Thank you!" as a confirmation message.

The text "Thank you!" is generated from https://img.en25.com/i/livevalidation_standalone.compressed.js.

>>>>>>>>>> var B=C||{};this.validMessage=B.validMessage||"Thank you!";

Question: What additional code do we need to use to override this confirmation message so we can place a German message instead of an English one?