diff --git a/Core/Makefile b/Core/Makefile
index 46fb086..96b39c6 100644
Binary files a/Core/Makefile and b/Core/Makefile differ
diff --git a/Core/build_all.bat b/Core/build_all.bat
index d97ea8a..0ef78c1 100644
--- a/Core/build_all.bat
+++ b/Core/build_all.bat
@@ -1,5 +1,5 @@
 @echo off
-nmake.exe /ls All LANG=En CFG=Debug   PLAT=Win32
-nmake.exe /ls All LANG=En CFG=Debug   PLAT=x64
-nmake.exe /ls All LANG=En CFG=Release PLAT=Win32
-nmake.exe /ls All LANG=En CFG=Release PLAT=x64
+nmake.exe /ls All LANG=en_US CFG=Debug   PLAT=Win32
+nmake.exe /ls All LANG=en_US CFG=Debug   PLAT=x64
+nmake.exe /ls All LANG=en_US CFG=Release PLAT=Win32
+nmake.exe /ls All LANG=en_US CFG=Release PLAT=x64
diff --git a/Core/clean_all.bat b/Core/clean_all.bat
index b4b4550..c2d1120 100644
--- a/Core/clean_all.bat
+++ b/Core/clean_all.bat
@@ -1,5 +1,5 @@
 @echo off
-nmake.exe /ls Clean LANG=En CFG=Debug   PLAT=Win32
-nmake.exe /ls Clean LANG=En CFG=Debug   PLAT=x64
-nmake.exe /ls Clean LANG=En CFG=Release PLAT=Win32
-nmake.exe /ls Clean LANG=En CFG=Release PLAT=x64
+nmake.exe /ls Clean LANG=en_US CFG=Debug   PLAT=Win32
+nmake.exe /ls Clean LANG=en_US CFG=Debug   PLAT=x64
+nmake.exe /ls Clean LANG=en_US CFG=Release PLAT=Win32
+nmake.exe /ls Clean LANG=en_US CFG=Release PLAT=x64
diff --git a/UI/Makefile b/UI/Makefile
index 7b24226..5111fcd 100644
Binary files a/UI/Makefile and b/UI/Makefile differ
diff --git a/UI/build_all.bat b/UI/build_all.bat
index d97ea8a..0ef78c1 100644
--- a/UI/build_all.bat
+++ b/UI/build_all.bat
@@ -1,5 +1,5 @@
 @echo off
-nmake.exe /ls All LANG=En CFG=Debug   PLAT=Win32
-nmake.exe /ls All LANG=En CFG=Debug   PLAT=x64
-nmake.exe /ls All LANG=En CFG=Release PLAT=Win32
-nmake.exe /ls All LANG=En CFG=Release PLAT=x64
+nmake.exe /ls All LANG=en_US CFG=Debug   PLAT=Win32
+nmake.exe /ls All LANG=en_US CFG=Debug   PLAT=x64
+nmake.exe /ls All LANG=en_US CFG=Release PLAT=Win32
+nmake.exe /ls All LANG=en_US CFG=Release PLAT=x64
diff --git a/UI/clean_all.bat b/UI/clean_all.bat
index b4b4550..c2d1120 100644
--- a/UI/clean_all.bat
+++ b/UI/clean_all.bat
@@ -1,5 +1,5 @@
 @echo off
-nmake.exe /ls Clean LANG=En CFG=Debug   PLAT=Win32
-nmake.exe /ls Clean LANG=En CFG=Debug   PLAT=x64
-nmake.exe /ls Clean LANG=En CFG=Release PLAT=Win32
-nmake.exe /ls Clean LANG=En CFG=Release PLAT=x64
+nmake.exe /ls Clean LANG=en_US CFG=Debug   PLAT=Win32
+nmake.exe /ls Clean LANG=en_US CFG=Debug   PLAT=x64
+nmake.exe /ls Clean LANG=en_US CFG=Release PLAT=Win32
+nmake.exe /ls Clean LANG=en_US CFG=Release PLAT=x64