The tilde is used in mathematics, logic, and computer science, and in those contexts the word in English that's commonly used for it is "tilde".
The word is in conventional English dictionaries, like Oxford, Cambridge, and Merriam-Webster. As those sources will tell you, it's also used to describe the mark "used when writing some languages".
As such, the idea that it's somehow not a word in English is just silly.
The word is in conventional English dictionaries, like Oxford, Cambridge, and Merriam-Webster. As those sources will tell you, it's also used to describe the mark "used when writing some languages".
As such, the idea that it's somehow not a word in English is just silly.