diff --git a/src/Translation/Reader.php b/src/Translation/Reader.php
index e5d90e4..8a78967 100644
--- a/src/Translation/Reader.php
+++ b/src/Translation/Reader.php
@@ -157,7 +157,7 @@ private function loadTranslationsInDirectory($directory, $locale, $namespace)
      */
     private function loadTranslations($locale, $group, $namespace, $file)
     {
-        if ($this->translationSheet->isExtraSheet()) {
+        if (pathinfo($file, PATHINFO_EXTENSION) === 'json') {
             $translations = Arr::dot(json_decode(file_get_contents($file), true));
         } else {
             $translations = Arr::dot($this->app['translator']->getLoader()->load($locale, $group, $namespace));