diff --git a/nsis/lang/README.txt b/nsis/lang/README.txt
index 07899cb..0340c30 100644
--- a/nsis/lang/README.txt
+++ b/nsis/lang/README.txt
@@ -18,6 +18,13 @@
  drop-down lists on the .vimrc page - 55 characters.
 Characters in this case mean characters of the English alphabet.
 
+Once the message translation file is ready, it must be included in the
+"gvim.nsi" file.
+Find the line "# Include support for other languages:" in the file "gvim.nsi"
+and specify the name of the file with your translation below the line
+!if ${HAVE_MULTI_LANG}, similar to the entries already there. File names are
+specified in alphabetical order.
+
 If you do not yet have a translated "LICENSE" file and/or a main "README.txt"
 file, set the following values:
 
@@ -32,3 +39,25 @@
 Translation files should be located in the "lang" subdirectory of the root
 directory. The name of the files is as follows: "README.xx.txt", where xx is the
 language code according to ISO639.
+
+
+There are two ways to test the installer in different languages:
+
+1. Find and uncomment the "!define MUI_LANGDLL_ALWAYSSHOW" line in the
+   "gvim.nsi" file and rebuild the installer.
+   Now every time you run it, you will see a dialog box with the possibility to
+   select the language of the installer.
+
+2. If the Vim editor is already installed in your system, delete the
+   "Installer Language" parameter in the Windows registry under
+   "HKEY_CURRENT_USER\Software\Vim".
+   Or you can create a file "NoLangInstallerVim.reg" with the following content:
+
+	Windows Registry Editor Version 5.00
+
+	[HKEY_CURRENT_USER\Software\Vim]
+	"Installer Language"=-
+
+   and apply it by double-clicking on it.
+   After these steps, when you start the installer, a window with the installer
+   language selection will also be displayed.