Extract method to pluralize text in JavaScript

This way we can reuse it in other places.

app/assets/javascripts/application.js

@@ -80,6 +80,7 @@
 //= require investment_report_alert
 //= require send_newsletter_alert
 //= require managers
+//= require i18n
 //= require globalize
 //= require send_admin_notification_alert
 //= require modal_download

app/assets/javascripts/globalize.js

@@ -77,19 +77,9 @@
     update_description: function() {
       var count, description;
       count = App.Globalize.enabled_locales().length;
-      description = App.Globalize.language_description(count);
+      description = App.I18n.pluralize($(".globalize-languages").data("languages-description"), count);
 
-      $(".js-languages-description").text(description.replace("%{count}", count));
-    },
-    language_description: function(count) {
-      switch (count) {
-      case 0:
-        return $(".globalize-languages").data("languages-description").zero;
-      case 1:
-        return $(".globalize-languages").data("languages-description").one;
-      default:
-        return $(".globalize-languages").data("languages-description").other;
-      }
+      $(".js-languages-description").text(description);
     },
     initialize: function() {
       $(".js-add-language").on("change", function() {

app/assets/javascripts/i18n.js

@@ -0,0 +1,18 @@
+(function() {
+  "use strict";
+  App.I18n = {
+    pluralize: function(texts, count) {
+      return this.raw_text(texts, count).replace("%{count}", count);
+    },
+    raw_text: function(texts, count) {
+      switch (count) {
+      case 0:
+        return texts.zero;
+      case 1:
+        return texts.one;
+      default:
+        return texts.other;
+      }
+    }
+  };
+}).call(this);