Switzerland's internet domain is .ch, and its currency is written as CHF, but neither starts with the English word "Switzerland".
The CH comes from Confoederatio Helvetica, the Latin name for the Swiss Confederation. Latin is useful here because Switzerland has German, French, Italian, and Romansh as national languages, so it avoids choosing one language over the others.
Helvetica here means something like "Helvetian" or "Swiss". The word points back to Helvetia, a Latin name associated with the land, and ultimately to the Helvetii, a Celtic tribe that lived on the Swiss Plateau before and during the Roman period. So there is a small ancient-history layer hiding inside a modern country code.
CHF follows the same logic. In the ISO currency code, CH identifies Switzerland and F stands for franc. So CHF is basically "Switzerland + franc" compressed into three letters.
CH plus F for franc.
It is one of those tiny naming choices where politics, language, and standards quietly meet each other.