Yii2 how to properly internationalize DateControl/DatePicker when working with RenderAjax or correct parameter passing?

Question

Yii

Dear colleagues. There is a problem:
1. There is a page on which a form is called in a modal window after clicking the button. The form contains a field for entering dates with a DateControl (or DatePicker, in this case, it doesn't matter) component.
Problem: When you click on the button, the page with the form is loaded into the modal window, but the DatePicker in the loaded form is not Russified.
When calling the page directly - datePicker with the correct regional settings (i.e. the first day is Monday, Russified, etc.).
What am I doing wrong? In theory, the renderAjax() method should render the plug-in view with all styles/scripts per request, but I have a feeling that this does not happen, or some parameters of the
Controller are lost:

public function actionIndex()
{
...
}

public function actionCreatemodalsuperform()
    {
        $model = new mysuperForm();
        $post=\Yii::$app->request->post();
        if ($post) 
        {
           ...
        }
        else {
                return $this->renderAjax('createmodalsuperform', [
                    'model' => $model,
                ]);
            }
    }

Form call page via Ajax

views\index.php
...
$this->registerJs('
$(function(){
    $("#createModalSuperformButton").click(function(){
        $("#createNewModalSuperform").modal("show").find("#modalSuperform").load($(this).attr("value"));
    });
});
', yii\web\View::POS_END);
?>
...
 <?= Html::button('<span class="glyphicon glyphicon-plus" aria-hidden="true"></span>',
       [
        'value'=>Url::to('/fund/createsuperform'),
       'class' => 'btn buttonaddfund btn-earning text-center buttonblock',
       'id' => 'createModalSuperformButton'
       ]) ?>
                
                <?php
                    Modal::begin([
                     'id' => 'createNewFundEarningModal',
                     'size'=>'modal-xs',
                    ]);
                    echo "<div id='modalContentEarning'></div>";
                    Modal::end();
                ?>

Form Page

views\createmodalsuperform.php
  <?php
...
use yii\widgets\ActiveForm;
use kartik\datecontrol\DateControl;

?> 

<div class="super-form">

    <?php $form = ActiveForm::begin( ['options' => ['enctype' => 'multipart/form-data']]); ?>
....
        <?= $form->field($model, 'date_created')->widget(FixedDateControl::classname(), [
        'type'=>DateControl::FORMAT_DATE,
        'ajaxConversion'=>true, 
        'language' => 'ru',

        'options' => [
            'class' => 'pull-right',
            'pluginOptions' => [
                'autoclose' => true,

            ],
            'removeButton' => false,
        ],
        'saveTimezone' => 'UTC',
        'displayTimezone' => 'UTC',

        ])->label(false);?>
....    
    <?php ActiveForm::end(); ?>

</div>