Rashi on Deuteronomy 28:49/רש"י על דברים כ״ח:מ״ט

1כאשר ידאה הנשר [THE LORD WILL BRING A NATION AGAINST YOU FROM AFAR], AS THE EAGLE SWOOPS DOWN — i.e. suddenly, and by a successful march, and its horses will be swift.

2לא תשמע לשנו means, a nation whose tongue thou shalt not understand. Similar is, (Genesis 41:15) “You understand (תשמע) a dream to interpret it”, and so, too, (Genesis 42:23) “that Joseph understood (שמע)”; entendre in old French