If (as in canon) the prophecy was made (1980) shortly before Harry’s birth, then Krum had been born (c. 1976), but I don’t suppose that he was talking yet. (ETA: Sorry, of course he was talking. But he would have sounded odd, an adult prophecy from the mouth of a child. That doesn’t really prove anything, I guess.)
If (as in canon) the prophecy was made (1980) shortly before Harry’s birth, then Krum had been born (c. 1976), but I don’t suppose that he was talking yet. (ETA: Sorry, of course he was talking. But he would have sounded odd, an adult prophecy from the mouth of a child. That doesn’t really prove anything, I guess.)