Untranslatable string: Passwords do not match

The string "Passwords do not match" in the user setup page (oem-config) is not translated, and evidently not translatable.

Seen in Ubuntu 10.10, ubiquity 2.4.8

To reproduce:
1) Boot to oem-config
2) Choose a non-English language such as Chinese
3) Continue to the user setup page; enter different passwords in the password and 'confirm your password' text fields.

Actual results:
The string "Passwords do not match" is displayed in English

Expected results:
The string "Passwords do not match" is displayed in the language chosen by the user

A cursory inspection of the code in ubi-usersetup.py (ubiquity 2.4.8) turns up the string in question, looks like it needs to templatized:

            if passw and (len(vpassw) / float(len(passw)) > 0.8):
                # TODO Cache, use a custom string.
                #txt = self.controller.get_string('user-setup/password-mismatch')
                txt = '<small><span foreground="darkred"><b>Passwords do not match</b></span></small>'
                self.password_error_label.set_markup(txt)
                self.password_error_label.show()