getLastUpdateTime: use the first available non-en_US locale

CRM/Uplang/Utils.php

@@ -34,9 +34,21 @@ class CRM_Uplang_Utils {
     return $l10n;
   }
 
+  public static function getNonUSLocale() {
+    $locales = CRM_Core_I18n::uiLanguages(TRUE);
+
+    foreach ($locales as $locale) {
+      if ($locale != 'en_US') {
+        return $locale;
+      }
+    }
+
+    throw new Exception(E::ts('Only en_US was found. Nothing to update.'));
+  }
+
   public static function getLastUpdateTime() {
     $l10n = CRM_Uplang_Utils::getDownloadDir();
-    $locale = 'fr_CA';
+    $locale = self::getNonUSLocale();
     $localFile = "$l10n/$locale/LC_MESSAGES/civicrm.mo";
     $mtime = filemtime($localFile);
     return $mtime;