If you take a look at the evolution of the most advanced non artificial general intelligence, eg. human intelligence, it is strongly connected to the evolution of communication. It is a question of efficiency whether you learn through your own experience and failures or through the experience and failures of others. This teaching/learning process was boosted through the use of pictures, spoken language, hand written and printed books. This is why I believe the artificial general intelligence will we teached by an other artificial general intelligence and this evolution will be somehow connected to language processing. As far as I know Google tries to train its AIs through human imput, eg. to recognize animals drawn by humans. I consider it as one of the first steps in the right direction.