I spent 22 months in Thailand 1962 - 1963, and made a real effort to learn Thai. I never did get to the point of being able to read a newspaper or hold an extended conversation. I could read street signs, and manage in the markets, but that was about it. I doubt JF learned much Vietnamese either.
>>>>>I could read street signs, and manage in the markets, but that was about it. I doubt JF learned much Vietnamese either.
I call that “functional competence” and I’m just a bit beyond that with Vietnamese speaking and listening (depends upon the regional accent of the speaker, which varies greatly throughout Vietnam).
As for Kerry, it is extremely doubtful that he ever got beyond a handful of words.