ng-bind not updating after closing modal form - angularjs

Question

I have a view with one list item. After user clicked on this item, the modal form show. When user change value and close modal, the item-not not updating.
View:
<ion-view ng-controller="settingsController">
<ion-content>
<div class="list">
<ion-item class="item-icon-left" ng-click="openLanguageModal()">
<i class="icon ion-chatboxes"></i>
{{'Language'| translate}}
<span class="item-note">
<div ng-bind="choice"></div>
</span>
</ion-item>
</div>
</ion-content>
<script id="language-modal.html" type="text/ng-template">
<div class="modal">
<ion-header-bar>
<!-- <button class="button button-full button-dark" ng-click="closeLanguageModal()">{{'Done' | translate}}</button> -->
<button class="button button-clear button-positive pull-right" ng-click="closeLanguageModal()">
{{'Done' | translate}}
</button>
</ion-header-bar>
<ion-content>
<ion-list>
<ion-radio ng-model="choice" ng-value="'en'"> English </ion-radio>
<ion-radio ng-model="choice" ng-value="'ru'"> Русский </ion-radio>
</ion-list>
</ion-content>
</div>
</script>
</ion-view>
Controller:
app.controller('settingsController', function($scope, $ionicModal) {
$ionicModal.fromTemplateUrl('language-modal.html', {
scope: $scope,
animation: 'slide-in-up'
}).then(function(modal) {
$scope.languageModal = modal;
})
$scope.choice = "en";
$scope.openLanguageModal = function() {
$scope.languageModal.show();
}
$scope.closeLanguageModal = function() {
$scope.languageModal.hide();
};
$scope.$on('$destroy', function() {
$scope.languageModal.remove();
});
});
I dont understand why the ng-bind didnt updates, help please

Answer 1

Try to use:
$scope.model.choice = "en";
in a main Controller (so that all other view controllers could inheritate this info).
and in all view (settings and language-modal) modify to:
ng-model="model.choice"
due to prototypal inheritance...
Here it is a working demo: http://codepen.io/beaver71/pen/XXaROB