That he can do this is amazing. I wonder how he decides to pick up a new language of Scrabble, considering the near decade gap between French and Spanish. Also

That he can do this is amazing. I wonder how he decides to pick up a new language of Scrabble, considering the near decade gap between French and Spanish. Also, what are the communication rules during play? Does he at least need to know enough Spanish to be able to issue or respond to a challenge?