Part of the menus in English and not in Spanish in 2.7

I have an iMac 10.6.8.
Being spaniard, I had Scrivener 2.6 in Spanish, but after updating to 2.7, some of the items in the menus appear in English and not in Spanish. The program itself works smoothly so far, but I can’t see how to fix this.
I have attached a screenshot of the program so you can see what I mean.
Thanks in advance.

Same problem here with the german localization. (OS X Yosemite, 10.10.5)

Same problem with spans localization (2.7 and Mac Os X El Capitan).

Scrivener 3.1.1 (9852) and Mojave.