Change text snipets in membermouse

I have installed membermouse and it added a log in/log out link to the menu.

This is fine, and it was directly translated to Portuguese, but I’d like to keep the text in English because “log in” and “log out” are universal, and the portuguese versions of that are too big.

Where I can change that?

PS: I did a trick for now; I removed the membermouse automatic login/logout link from the menu and inserted a link (called “log in”) that directs to the login page. There is a problem with this, though… if the user logs in, it doesn’t change to “log out”, as one could expect.

The page I need help with: [log in to see the link]