diff --git a/contrib/check-code.py b/contrib/check-code.py
--- a/contrib/check-code.py
+++ b/contrib/check-code.py
@@ -113,7 +113,7 @@ pypats = [
     (r'[^+=*!<>&| -](\s=|=\s)[^= ]',
      "wrong whitespace around ="),
     (r'raise Exception', "don't raise generic exceptions"),
-    (r'ui\.(status|progress|write|note)\([\'\"]x',
+    (r'ui\.(status|progress|write|note|warn)\([\'\"]x',
      "warning: unwrapped ui message"),
 ]
 
diff --git a/mercurial/dispatch.py b/mercurial/dispatch.py
--- a/mercurial/dispatch.py
+++ b/mercurial/dispatch.py
@@ -492,7 +492,7 @@ def _dispatch(ui, args):
                 raise
         args.insert(0, repo)
     elif rpath:
-        ui.warn("warning: --repository ignored\n")
+        ui.warn(_("warning: --repository ignored\n"))
 
     d = lambda: util.checksignature(func)(ui, *args, **cmdoptions)
     return runcommand(lui, repo, cmd, fullargs, ui, options, d,
diff --git a/mercurial/repair.py b/mercurial/repair.py
--- a/mercurial/repair.py
+++ b/mercurial/repair.py
@@ -150,9 +150,10 @@ def strip(ui, repo, node, backup="all"):
                 os.unlink(chgrpfile)
     except:
         if backupfile:
-            ui.warn("strip failed, full bundle stored in '%s'\n" % backupfile)
+            ui.warn(_("strip failed, full bundle stored in '%s'\n")
+                    % backupfile)
         elif saveheads:
-            ui.warn("strip failed, partial bundle stored in '%s'\n"
+            ui.warn(_("strip failed, partial bundle stored in '%s'\n")
                     % chgrpfile)
         raise
 
diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -304,7 +304,7 @@ class ui(object):
         p = self.config('paths', loc)
         if p:
             if '%%' in p:
-                self.warn("(deprecated '%%' in path %s=%s from %s)\n" %
+                self.warn(_("(deprecated '%%' in path %s=%s from %s)\n") %
                           (loc, p, self.configsource('paths', loc)))
                 p = p.replace('%%', '%')
             p = util.expandpath(p)