Here s another source that also disambiguates Cantonese from Yue Cantonese a comprehensive grammar by Stephen Matthews and Virginia Yip p 2 Cantonese is the most widely known and influential variety of Chinese other than Mandarin It belongs to the Yue group of dialects p 3 Traditionally the speech of Guangzhou Canton is the standard of comparison hence the terms Cantonese and Gw ngj u W It seems to me that although the term Cantonese can be used to refer to Yue in general I have seen no source that does this without needing to preface the fact that they are referring to the more general group Every source I ve seen always uses Cantonese to refer to the prestige standard dialect whenever the word is unqualified This appears to be the common English usage of the word