Interesting watch. TL;DW - Apes like Koko were raised by trainers who did not perform rigorous scientific measurements and were prone to bias. Research on Apes became immoral over time, hence less recent examples exist.

The most recent and rigorous study is on a bonobo, where communication is done using touchscreen with buttons saying words (lexigrams). Even in this case interaction seems to be limited to “give me an item” or “put item in box”.