Pleas look at this screenshot
https://www.dropbox.com/s/w0nkmblwpogfalp/Screenshot%202016-08-01%2009.18.57.png?dl=0
INFO:
My computer lang is english but
I double checked and WP lang is spanish since I installed it.
I know.. but only half is translated.. my lang is in spanish but ai still see some title in the calendar in english
Can you provide more details? I have the same issue and disabled Wordbooker but the problem remains.
Thanks.