Paperspade might be described as a language translator. Unlike Google Translate or any other feature, it can't translate English to Spanish, French to Russian, or any other spoken languages for that matter. In fact, in can only translate exactly one language into another. The software is designed to translate natural English language into complex mathematical notation.
Anyone who's taken high level mathematics knows that typing out equations for assignments can be a pain. It requires either constantly copying and pasting symbols from random websites or memorizing a Byzantine system of Unicode hotkeys. With Paperspade, users can use English to type in the equation that they want, and the software will automatically translate those words into the accepted mathematical notation. That means no more hunting around for the hotkey that represents double integral or summation.