In Commonwealth English, sugar substitutes are often referred to as "sweeteners" (to the exclusion of sugar).
This may be seen in soft drinks such as cola labeled as "diet" or "light" or "economy" which contain artificialsweeteners and often have notably different mouthfeel; or in table sugar replacements which mix maltodextrins with an intense sweetener to achieve satisfactory texture sensation.
Saccharin was the first artificialsweetener and was originally synthesized in 1879 by Remsen and Fahlberg and its sweet taste was discovered by accident.