Do the apes read English?
Someone pointed out in the "They give Zira wine to drink" thread that of course she can read English, as Taylor wrote her his notes when they are in her house in POTA.
But this now made me think of the fact that there is no English writing in the movies 1+2 at all, that the symbols written on the statue and the apes's costumes was probably their writing.
And yet when questioned, Zira says in Escape that they only speak one language and that it turns out it's English (they don't know what "English" means).
So at the very least they read two languages?