diff --git a/kernel/trunk/Makefile b/kernel/trunk/Makefile
index 8f924bca16..d14e98644a 100644
--- a/kernel/trunk/Makefile
+++ b/kernel/trunk/Makefile
@@ -1,6 +1,6 @@
 FASM=fasm
 FLAGS=-m 65536
-languages=en|ru|ge|et|sp
+languages=en_US|ru_RU|de_DE|et_EE|es_ES
 
 .PHONY: all kernel bootloader clean
 
diff --git a/kernel/trunk/build.bat b/kernel/trunk/build.bat
index c9adb2de53..4660b7fb02 100644
--- a/kernel/trunk/build.bat
+++ b/kernel/trunk/build.bat
@@ -11,7 +11,7 @@ pause
 goto :eof
 
 :Target_kernel
-   rem valid languages: en ru ge et sp
+   rem valid languages: en_US ru_RU de_DE et_EE es_ES
    set lang=en
 
    echo *** building kernel with language '%lang%' ...
diff --git a/kernel/trunk/build.sh b/kernel/trunk/build.sh
index bdd23245b1..55ad4e6e8c 100755
--- a/kernel/trunk/build.sh
+++ b/kernel/trunk/build.sh
@@ -6,7 +6,7 @@ KERPACK=$HOME/kolibrios/programs/other/kpack/kerpack_linux/kerpack
 KOLIBRI_IMG=$HOME/nightly/kolibri.img
 
 replace=0; # Replace kernel in the image file?
-echo 'lang fix en' > lang.inc
+echo 'lang fix en_US' > lang.inc
 fasm -m 65536 bootbios.asm bootbios.bin
 fasm -m 65536 kernel.asm kernel.mnt
 $KERPACK kernel.mnt kernel.mnt