diff --git a/reactos/base/system/rundll32/De.rc b/reactos/base/system/rundll32/de-DE.rc
similarity index 86%
rename from reactos/base/system/rundll32/De.rc
rename to reactos/base/system/rundll32/de-DE.rc
index 51586685486..e6ab49e5b50 100644
--- a/reactos/base/system/rundll32/De.rc
+++ b/reactos/base/system/rundll32/de-DE.rc
@@ -4,7 +4,7 @@
  * By Rouven Wessling 2005 pentiumforever@gmail.com
  */
 
-LANGUAGE LANG_GERMAN, SUBLANG_NEUTRAL
+LANGUAGE LANG_GERMAN, SUBLANG_GERMAN
 STRINGTABLE DISCARDABLE
 {
 IDS_DllNotLoaded,   "LoadLibrary laden von '%s' fehlgeschlagen"
diff --git a/reactos/base/system/rundll32/Gr.rc b/reactos/base/system/rundll32/el-GR.rc
similarity index 100%
rename from reactos/base/system/rundll32/Gr.rc
rename to reactos/base/system/rundll32/el-GR.rc
diff --git a/reactos/base/system/rundll32/En.rc b/reactos/base/system/rundll32/en-US.rc
similarity index 100%
rename from reactos/base/system/rundll32/En.rc
rename to reactos/base/system/rundll32/en-US.rc
diff --git a/reactos/base/system/rundll32/Fr.rc b/reactos/base/system/rundll32/fr-FR.rc
similarity index 84%
rename from reactos/base/system/rundll32/Fr.rc
rename to reactos/base/system/rundll32/fr-FR.rc
index 170057901ee..fadbf2eb87d 100644
--- a/reactos/base/system/rundll32/Fr.rc
+++ b/reactos/base/system/rundll32/fr-FR.rc
@@ -4,7 +4,7 @@
  * By Magnus Olsen  2005 magnus@itkonsult-olsen.com
  */
 
-LANGUAGE LANG_FRENCH, SUBLANG_NEUTRAL
+LANGUAGE LANG_FRENCH, SUBLANG_FRENCH
 STRINGTABLE DISCARDABLE
 {
 IDS_DllNotLoaded,   "LoadLibrary a échoué lors du chargement de '%s'"
diff --git a/reactos/base/system/rundll32/Hu.rc b/reactos/base/system/rundll32/hu-HU.rc
similarity index 100%
rename from reactos/base/system/rundll32/Hu.rc
rename to reactos/base/system/rundll32/hu-HU.rc
diff --git a/reactos/base/system/rundll32/Ja.rc b/reactos/base/system/rundll32/ja-JP.rc
similarity index 100%
rename from reactos/base/system/rundll32/Ja.rc
rename to reactos/base/system/rundll32/ja-JP.rc
diff --git a/reactos/base/system/rundll32/No.rc b/reactos/base/system/rundll32/nb-NO.rc
similarity index 83%
rename from reactos/base/system/rundll32/No.rc
rename to reactos/base/system/rundll32/nb-NO.rc
index 5a78368a40d..573c978a2fb 100644
--- a/reactos/base/system/rundll32/No.rc
+++ b/reactos/base/system/rundll32/nb-NO.rc
@@ -4,7 +4,7 @@
  * By Magnus Olsen  2005 magnus@itkonsult-olsen.com
  */
 
-LANGUAGE LANG_NORWEGIAN, SUBLANG_NEUTRAL
+LANGUAGE LANG_NORWEGIAN, SUBLANG_NORWEGIAN_BOKMAL
 STRINGTABLE DISCARDABLE
 {
 IDS_DllNotLoaded,   "LoadLibrary mislykket å laste '%s'"
diff --git a/reactos/base/system/rundll32/Ru.rc b/reactos/base/system/rundll32/ru-RU.rc
similarity index 100%
rename from reactos/base/system/rundll32/Ru.rc
rename to reactos/base/system/rundll32/ru-RU.rc
diff --git a/reactos/base/system/rundll32/rundll32.rc b/reactos/base/system/rundll32/rundll32.rc
index e3680baf290..5f9cab41d1c 100644
--- a/reactos/base/system/rundll32/rundll32.rc
+++ b/reactos/base/system/rundll32/rundll32.rc
@@ -6,11 +6,11 @@
 #define REACTOS_STR_ORIGINAL_FILENAME	"rundll32.exe\0"
 #include <reactos/version.rc>
 
-#include "En.rc"
-#include "De.rc"
-#include "Fr.rc"
-#include "Hu.rc"
-#include "Ru.rc"
-#include "Gr.rc"
-#include "No.rc"
-#include "Uk.rc"
+#include "en-US.rc"
+#include "de-DE.rc"
+#include "fr-FR.rc"
+#include "hu-HU.rc"
+#include "ru-RU.rc"
+#include "el-GR.rc"
+#include "nb-NO.rc"
+#include "uk-UA.rc"
diff --git a/reactos/base/system/rundll32/Uk.rc b/reactos/base/system/rundll32/uk-UA.rc
similarity index 100%
rename from reactos/base/system/rundll32/Uk.rc
rename to reactos/base/system/rundll32/uk-UA.rc