Can't get events portlet in portuguese

I'm working in a plone site (version 5.1) in two languages English and Portuguese. I can't get the events portlet in Portuguese. With the news portlet I haven't any problem.
I followed the same procedure I've used for news portlet but I was not so lucky.
I'll appreciate any help.

According to

PT is only translated by 88%.

Perhaps you just made contact with the missing 12%?