Page "Hakka Chinese" Paragraph 1

Due to its original usage in scattered isolated regions where communication is limited to the local area, the Hakka language has developed numerous variants or dialects, spoken in Guangdong, Fujian, Jiangxi, Guangxi, Sichuan, Hunan, and Guizhou provinces, including Hainan island, Singapore and Taiwan.

Hakka is not mutually intelligible with Mandarin, Wu, Minnan, or other branches of Chinese.

It is most closely related to Gan, and is sometimes classified as a variety of Gan.