I have goose-bumps.
Maadar-e-Millat Fatimah Jinnah has included this mind-boggling episode in her book MERA BHAI (My Brother 1962). I feel ecstasy-drunk whenever I think of this event.
Please recall that M.A.Jinnah chose the Lincoln Inn in London for his law studies since he saw the exalted Prophet's name prominently inscribed among the 'Great Legislators of the World'. He was just 18 at the time.
I have no hesitation in believing that Allah might have taught the exalted Prophet each and every language since he was RAHMAT-AL-LIL-'AALAMEEN.