diff --git a/CHANGES.txt b/CHANGES.txt
index 63f1b89..abdecff 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -7,6 +7,12 @@ Bug Fixes
 - Un-break wrapping of callable instances as ``colander.deferred``.
   See https://github.com/Pylons/colander/issues/141.
 
+Features
+~~~~~~~~
+
+- Allow localization of error messages returned by ``colander.Invalid.asdict``
+  by adding an optional ``translate`` callable argument.
+
 1.0b1 (2013-09-01)
 ------------------
 
diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index a1cf78f..065840e 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -114,3 +114,4 @@ Contributors
 - Brian Sutherland, 2013/08/16
 - Peter Lamut, 2013/08/16
 - Veeti Paananen, 2013/08/20
+- Alex Marandon, 2013/12/21
diff --git a/colander/__init__.py b/colander/__init__.py
index f1d2f00..a68913b 100644
--- a/colander/__init__.py
+++ b/colander/__init__.py
@@ -167,7 +167,12 @@ class Invalid(Exception):
 
     def asdict(self, translate=None):
         """ Return a dictionary containing a basic
-        (non-language-translated) error report for this exception"""
+        (non-language-translated) error report for this exception.
+
+        If ``translate`` is supplied, it must be a callable taking a
+        translation string as its sole argument and returning a localized,
+        interpolated string.
+        """
         paths = self.paths()
         errors = {}
         for path in paths: