diff --git a/README.md b/README.md
index d52357037..1ca04dbfc 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,9 @@ OS. Windows users are suggested to develop in a Linux VM or use
 andLinux, Wubi.
 
 To get and compile the source you must have `patch`, `wget`, `unzip`, `git`,
-`svn` and `cmake` installed.
+`svn`, `autoconf` and `cmake` installed.
+
+Version of autoconf need to be greater than 2.64.
 
 You might also need SDL library packages if you want to compile and run the PC
 emulator. Fedora users can install `SDL` and `SDL-devel`. Ubuntu users can
diff --git a/l10n/README.md b/l10n/README.md
new file mode 100644
index 000000000..49f95a5ec
--- /dev/null
+++ b/l10n/README.md
@@ -0,0 +1,8 @@
+# How to sync this folder with transifex
+
+1. install transifex client. For example: `apt-get install transifex-client`.
+
+2. configure the client:
+   http://support.transifex.com/customer/portal/articles/1000855-configuring-the-client
+
+3. pull changes from transifex: `make update`