It passes all three tests.

Nova (the little girl) and Maurice (the Orangutan) are both female and have communication throughout the movie.

Maurice isn't female

@jon This rating is correct.

I don't remember it being explicitly mentioned in this part, but Maurice is clearly male. The fact that he was in a caring role and was voiced by a female voice actor probably misled you.

Exhibit a: The previous movies

Exhibit b: The fact that every character listing and movie description lists Maurice as male or uses male pronouns

Exhibit c: Wikipedia lists "Maurice" as a "traditionally male name"

Maurice is female if you read into the lore of planet of the apes, you can find that she is here:
planetoftheapes.wikia.com/wiki/Maurice
Sign language is still a form of communication the same way that an ape is a female.

The link to wikia posted even says Maurice is a dude.

We apologise (we're 'not is wrong') since we posted the comment regarding the gender of Maurice the Wiki has been changed, it distinctly said he was female but now it states male. This was most likely because the actress playing Maurice is female.