A History of Short Words

From the New York Times Crossword Puzzle

HAI

Wed, 10 Jan '24
"Yes," in Japanese
Sun, 26 Nov '23
Japanese "yes"
Tue, 8 Nov '22
Japanese for "yes"
Sun, 27 Feb '22
"OK!" in Okayama
Fri, 2 Jul '21
Japanese assent
Sun, 9 May '21
Yes, in Yokohama