How this improvisation game can be used to learn a language?
It came to my mind that this game can be applied to learn a new language, let me explain how.
When I want to learn a new grammar rule, and more specifically the use of some grammatic structure, a strategy that I use is repeating many times sentences with the grammar rule, or structure, until somehow the rule becomes embedded in my brain. This method can be integrated with the improvisation game that I described above by asking someone, a friend or your private language teacher, to suggest you some words and than by making up sentences with that words and the rule that you want to learn.