The author has discovered (linguistic) morphology. The `setRole` function he describes compiles to various morphemes in Japanese like は, を, etc. https://en.wikipedia.org/wiki/Morphology_(linguistics) We have this in English too except remarkably little of it actually comes out. Pluralization and possession being marked with -(e)s and -'s suffixes, and "subject-verb agreement" (one wouldn't say "the birds eat s the fo…
Some languages share more intermediate compiler stages than others (Latin, Italian, French) whereas share a lot fewer (English and Japanese come to mind).
One thing I like about this formulation is that humanity doesn't all need to have the same meat / "hardware" in their brains at the bottom layer (which is kind of unsatisfying and less-plausible, and makes me think of 2001: A Space Odyssey), as long as there is interoperability at the highest layer.