diff -Nuar ubiquity.orig/ubiquity/frontend/base.py  ubiquity/ubiquity/frontend/base.py
--- ubiquity.org/ubiquity/frontend/base.py	2010-01-20 10:01:27.000000000 +0100
+++ ubiquity/ubiquity/frontend/base.py	2010-01-20 10:01:59.000000000 +0100
@@ -87,7 +87,7 @@
         self.summary_device = None
         self.grub_en = None
         self.popcon = None
-        self.locale = None
+        self.locale = os.environ['LANG']
         self.http_proxy_host = None
         self.http_proxy_port = 8080