diff --git a/src/api.php b/src/api.php
index 25ae40b..ed58b79 100644
--- a/src/api.php
+++ b/src/api.php
@@ -61,7 +61,7 @@ $endpoints = array(
 );
 
 // look for extensions
-foreach (MTTExtensionLoader::registeredExtensions() as $instance) {
+foreach (MTTExtensionLoader::loadedExtensions() as $instance) {
     if ($instance instanceof MTTHttpApiExtender) {
         $newRoutes = $instance->extendHttpApi();
         foreach ($newRoutes as $endpoint => $methods) {
diff --git a/src/includes/classes.php b/src/includes/classes.php
index 4c32b0e..7e3bde0 100644
--- a/src/includes/classes.php
+++ b/src/includes/classes.php
@@ -124,7 +124,7 @@ class MTTExtensionLoader
             throw new Exception("Failed to register extension '$ext': require class constants (codename, title)");
         }
         if ($instance::codename != $ext) {
-            throw new Exception("Extension '$ext' codename does not equal to extension dir");
+            throw new Exception("Extension '$ext' codename does not conforms to extension dir");
         }
 
         $instance->init();
@@ -134,7 +134,7 @@ class MTTExtensionLoader
     /**
      * @return MTTExtension[]
      */
-    public static function registeredExtensions(): array
+    public static function loadedExtensions(): array
     {
         $a = [];
         foreach (self::$exts as $ext => $instance) {
@@ -164,7 +164,7 @@ class MTTExtensionLoader
         return self::$exts[$ext] ?? null;
     }
 
-    public static function isRegistered(string $ext): bool
+    public static function isLoaded(string $ext): bool
     {
         return isset(self::$exts[$ext]);
     }