diff -r b98dd5d3065c -r f48cd2f48d14 hgext/evolve.py
--- a/hgext/evolve.py	Mon Jun 30 13:29:49 2014 -0400
+++ b/hgext/evolve.py	Mon Jun 30 13:37:15 2014 -0400
@@ -2138,7 +2138,7 @@
         raise util.Abort("set has multiple roots")
     root = repo[roots[0]]
     if root.phase() <= phases.public:
-        raise util.Abort("can't fold public revisions")
+        raise util.Abort(_("cannot fold public revisions"))
     heads = repo.revs('heads(%ld)', revs)
     if len(heads) > 1:
         raise util.Abort("set has multiple heads")