javascript - How to change response(error/success) language in stripe.js

I'm using stripe.js v2 to process payments for the application I'm developing for a French client , everything is working as it should so far, however, when it comes to form validation, I want to display the errors in French instead of english, I have read about it in the docs and all I could find is the locale param which didn't work for my case, here's a code snippet of the form I'm using;

<form enctype="multipart/form-data"
                      role="form"
                      action="{{route('payment')}}"
                      method="post"
                      class="require-validation"
                      data-cc-on-file="false"
                      data-stripe-publishable-key="{{ env('STRIPE_PUBLIC') }}"
                      data-locale="fr"
                      id="payment-form">
                    @csrf
                    <input type="hidden" name="total" value="{{$total}}">
                <div class="modal-body">
                    <!-- Credit card form tabs -->
                    <ul role="tablist" class="nav nav-pills rounded-pill nav-fill mb-3">
                        <li class="nav-item">
                            <a data-toggle="pill" href="#nav-tab-card" class="nav-link active rounded-pill">
                                <i class="fa fa-credit-card"></i>
                                Carte Cr?�dit/D?�bit
                            </a>
                        </li>
                        <li class="nav-item">
                            <a data-toggle="pill" href="#nav-tab-paypal" class="nav-link rounded-pill">
                                <i class="fa fa-paypal"></i>
                                Paypal
                            </a>
                        </li>
                        <li class="nav-item">
                            <a data-toggle="pill" href="#nav-tab-bank" class="nav-link rounded-pill">
                                <i class="fa fa-university"></i>
                                Banque
                            </a>
                        </li>
                    </ul>
                    <!-- End -->

                    <!-- Credit card form content -->
                    <div class="tab-content">

                        <!-- credit card info-->
                        <div id="nav-tab-card" class="tab-pane fade show active">

                            <div class='col-md-12 error form-group hide'>
                                <div class='alert-danger alert'>
                                    Corrigez les ?�rreurs et r?�essayez! 
                                    // it is showing when getting errors, but it gets replaced after a 
                                    // second by stripe's error message
                                </div>
                            </div>

                            <div class="form-group required">
                                <label for="email" class="control-label"><span>Email</span></label>
                                <input type="email" name="email" placeholder="Votre Email" class="form-control" required autocomplete="off">
                            </div>

                            <div class="form-group required">
                                <label for="username" class="control-label"><span>Nom Complet</span></label>
                                <input type="text" name="username" placeholder="Votre Nom & Pr?�nom" class="form-control" autocomplete="off">
                            </div>

                            <div class="form-group required">
                                <label for="cardnumber" class="control-label"><span>Num?�ro De Carte</span></label>
                                <div class="input-group">
                                    <input type="text" name="cardnumber" placeholder="Votre Num?�ro De Carte" class="form-control card-number" maxlength="20" autocomplete="off">
                                    <div class="input-group-append">
                                            <span class="input-group-text text-muted">
                                                <i class="fa fa-cc-visa mx-1"></i>
                                                <i class="fa fa-cc-amex mx-1"></i>
                                                <i class="fa fa-cc-mastercard mx-1"></i>
                                            </span>
                                    </div>
                                </div>
                            </div>

                            <div class="row">
                                <div class="col-sm-8">
                                    <div class="form-group expiration required">
                                        <label class="control-label"><span class="hidden-xs">Date D'?�xpiration</span></label>
                                        <div class="input-group">
                                            <input type="text" placeholder="Mois" name="month" class="form-control card-expiry-month required" maxlength="2" autocomplete="off">
                                            <input type="text" placeholder="Ann?�e" name="day" class="form-control card-expiry-year required" maxlength="2" autocomplete="off">
                                        </div>
                                    </div>
                                </div>
                                <div class="col-sm-4">
                                    <div class="form-group cvc mb-4 required">
                                        <label class="control-label"><span>CVC</span></label>
                                        <input type="text" class="form-control card-cvc required" placeholder="Ex: 324" maxlength="4" name="cvc" autocomplete="off">
                                    </div>
                                </div>
                            </div>

                        </div>
                        <!-- End -->

                        <!-- Paypal info -->
                        <div id="nav-tab-paypal" class="tab-pane fade">
                            <p>Paypal is easiest way to pay online</p>
                            <p>
                                <button type="button" class="btn btn-primary rounded-pill"><i class="fa fa-paypal mr-2"></i> Log into my Paypal</button>
                            </p>
                            <p class="text-muted">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
                            </p>
                        </div>
                        <!-- End -->

                        <!-- bank transfer info -->
                        <div id="nav-tab-bank" class="tab-pane fade">
                            <h6>Bank account details</h6>
                            <dl>
                                <dt>Bank</dt>
                                <dd> THE WORLD BANK</dd>
                            </dl>
                            <dl>
                                <dt>Account number</dt>
                                <dd>7775877975</dd>
                            </dl>
                            <dl>
                                <dt>IBAN</dt>
                                <dd>CZ7775877975656</dd>
                            </dl>
                            <p class="text-muted">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
                            </p>
                        </div>
                        <!-- End -->
                    </div>
                    <!-- End -->
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-dismiss="modal">Annuler</button>
                    <button type="submit" class="btn btn-primary">Payer</button>
                </div>
                </form>

Here's the stripe js code that I'm using:

Stripe js code Stripe js code II


Now, what I'm trying to do here is change the validation response language, so, for example, if a user happens to miss a field, or fill it with invalid info, I'd like the response to be "Num?�ro de carte invalide" instead of "Invalid Card number", and the same for the rest of the fields' validation.

How do you think I can achieve it? using javascript or any other method.

I'm using PHP//Laravel for backend if you need to know.

Thank you.

Answer

Solution:

You can use localization: https://stripe.com/docs/js/appendix/supported_locales

Create your Stripe instance with locale:

var stripe = Stripe('pk_test_TYooMQauvdEDq54NiTphI7jx', {
  locale: 'fr'
});

Source