JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://www.nextsoft.pt/_stackoverflow/parsley/i18n/pt.js"></script>
<script src="http://www.nextsoft.pt/_stackoverflow/parsley/parsley.js"></script>
<form method="post" id="myForm">
    <input type="text" name="name" value="" data-parsley-required="true"
        data-parsley-required-en="Name is required"
        data-parsley-required-pt="O nome é obrigatório" />
    <input type="number" name="phone" value=""
        data-parsley-minlength="9"
        data-parsley-minlength-en="Phone length must be equal to %s"
        data-parsley-minlength-pt="O telefone deverá ter 9 digitos" />
    <input type="submit" value="Go" />
</form>

JavaScript

window.ParsleyValidator.setLocale('pt');
$("#myForm").parsley();