diff --git a/MdeModulePkg/Universal/HiiDatabaseDxe/String.c b/MdeModulePkg/Universal/HiiDatabaseDxe/String.c
index d0d13f1de7..eeac9c2087 100644
--- a/MdeModulePkg/Universal/HiiDatabaseDxe/String.c
+++ b/MdeModulePkg/Universal/HiiDatabaseDxe/String.c
@@ -1973,18 +1973,5 @@ HiiCompareLanguage (
   // When languages are exactly same, they will be identical. 
   //
   Language2Len = AsciiStrLen (Language2);
-  if (AsciiStrnCmp (Language2, Language1, Language2Len) == 0) {
-    return TRUE;
-  }
-  
-  //
-  // When Language1 is the sub tag of Language2, they will also be regarded as identical.
-  // This is added to support current Shell. Shell string package uses "en" as language name. 
-  // But, it may use platform language "en-US" to get string value.
-  //
-  if (AsciiStrStr (Language2, Language1) == Language2) {
-    return TRUE;
-  }
-  
-  return FALSE;
+  return  (BOOLEAN) (AsciiStrnCmp (Language1, Language2, Language2Len) == 0);
 }