[simple-scan] Update README.md file with information how to help with translations.

[Robert Ancell <rancell src gnome org>]

commit e54cea07fb4d4803b1993adfb2cb2c39955aaff9
Author: Bartosz Kosiorek <gang65 poczta onet pl>
Date:   Mon Dec 2 23:38:34 2019 +0100

    Update README.md file with information how to help with translations.
    
    Fixes: #135

 README.md | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/README.md b/README.md
index 84d38cb..4fd1efe 100644
--- a/README.md
+++ b/README.md
@@ -66,8 +66,8 @@ environment variable:
 $ export SANE_DEBUG_DLL=255
 ```
 
-With such set, loading of Sane backends will be displayed, during *Simple Scan*
-run.
+When set, SANE backends will show informational messages while
+*Document Scanner* is running
 
 Example:
 
@@ -89,3 +89,10 @@ shared library, during loading `smfp` prioprietary backend:
 To contribute code create merge requests on
 [gitlab.gnome.org](https://gitlab.gnome.org/GNOME/simple-scan). If you
 find issues please [report them](https://gitlab.gnome.org/GNOME/simple-scan/issues).
+
+## Translation
+
+A lot of information about translation process can be found at
+[GNOME TranslationProject](https://wiki.gnome.org/TranslationProject/).
+The translation files for *Document Scanner* User Interface and User Guide,
+are available [here](https://l10n.gnome.org/module/simple-scan/).