Thanks for the nice video.
I looked at source-code of CB login module, and on your output and my conclusion *guess* is that the SQL query getting the number of unread messages doesn't return ok with joomFish.
Please try setting the messages to display also "no message" in cb login module params, to confirm this hypothesis. In that case you would see "1 message" in English and "no messages" in portuguese.
Please also update joomFish to very latest, if you don't have latest as some fixes took place lately.
Finally enable site debug in joomla config, and check for the SQL queries for the PMS from CB login, maybe some debug messages of joomFish will help too.