In English, there is a connection between words and their meanings, but words with completely different spellings are used, such as mutton mutton-sheep, pig-pig-pork.

There will be a difference between pigs, cattle and sheep and pork, beef and mutton. And you guessed it, this is a historical reason.

To put it simply, in the10-1century, when the Normans occupied England, they usually let the native Anglo-Saxons do the rough work of feeding livestock. They used old English words to represent pigs, cows and sheep. Norman Frankish nobles, as rulers, enjoyed the meat of these livestock at the dinner table. They used Norman Frankish to express pork, beef and mutton. So the two languages have different views.

I hope I can answer your doubts.