Coca-Cola is the second most widely understood term in the world after 'OK'.

Coca-Cola is the second most widely understood term in the world after “OK”.

Studies have shown that Coca‑Cola is among the most‑admired and best‑known trademarks in the world. In fact, it is documented that “Coca‑Cola” is the second‑most widely understood term in the world, after “okay.”

Source