There's a mistake in that article - Japanese does indeed have a word for green (midori, みどり(緑)) it's just relatively young, so especially traffic lights are st

There's a mistake in that article - Japanese does indeed have a word for green (midori, みどり(緑)) it's just relatively young, so especially traffic lights are still referred to as blue in some kind of weird linguistic hangover. All other green things (grass, clothes etc.) are referred to as actually green (midori).