Simplified Wade

Simplified Wade, abbreviated SW, is a modification of the Wade–Giles romanization system for writing Standard Mandarin Chinese. It was devised by the Swedish linguist Olov Bertil Anderson (1920–1993),^[1] who first published the system in 1969.^[2] Simplified Wade uses tonal spelling: in other words it modifies the letters in a syllable in order to indicate tone differences. It is one of only two Mandarin romanization systems that indicate tones in such a way (the other being Gwoyeu Romatzyh). All other systems use diacritics or numbers to indicate tone.