It's totally possible with custom libraries in jQuery which I would suggest - https://github.com/aslamanver/abvalidate
Custom Message - jQuery Form Validation - abValidate.js
ab-validation="required|Hey dude you missed that,min:5| No no you want to type more" name="name"
Use this library by adding these CDNs
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!-- abValidate Library -->
<script type="text/javascript" src="https://raw.githubusercontent.com/aslamanver/abvalidate/master/abValidate.min.js">
<link rel="stylesheet" href="https://raw.githubusercontent.com/aslamanver/abvalidate/master/abValidate.css">
Initialize the library
$(document).ready(function () {
//.ab-form is your form class
$(".ab-form").abValidate();
});
There you go, now you can use your custom validation using jQuery abValidate library
<form class="ab-form" action="your_action_url">
<!-- Input and error message should be in a div class -->
<div class="my-form-group">
<input type="text" ab-validation="required|Hey dude you missed that,min:5| No no you want to type more" name="name" class="ab-validation-i" />
<div class="error"></div>
</div><br>
<div class="my-form-group">
<input type="submit" name="submit" value="Submit">
</div>
</form>