message: Add a missing language string
diff: "Token incorrect": "Token incorrect",
  "A text message has been sent to %(msisdn)s": "A text message has been sent to %(msisdn)s",
  "Please enter the code it contains:": "Please enter the code it contains:",
  + "Code": "Code",
  "Start authentication": "Start authentication",
  "powered by Matrix": "powered by Matrix",
  "Username on %(hs)s": "Username on %(hs)s",
  