> There is no official romanization of Cantonese. There is, it is called 粵拼 or Jyutping (https://www.lshk.org/jyutping https://www.lshk.org/jyutping). However,

> There is no official romanization of Cantonese. There is, it is called 粵拼 or Jyutping (https://www.lshk.org/jyutping https://www.lshk.org/jyutping). However, its use is not enforced, and the original British colonial era romanisation remains frequently used in HK. There is also the Yale system that predates Jyutping and is still also in wide use in teaching materials and dictionaries. Therefore, 唔 is romanised as «m4» in Jyuping and as «m̀ h» in Yale. «4» in Jyutping and the backtick over «m» indicate the low falling tone.