Random intervene! Woohoo!

As a person who can speak chinese, mandarine, english and malay, I could give some honest opinion, LoL. (From the combination of the language i know, you should know which country I originate from, LoL.)

Cantonese, even within citizen and between cantonese, we admits that cantonese somehow felt like it sounded more rude compared to all other languages, LoL.

There are times where I felt korean and japanese are similar to chinese/cantonese.

For example, japanese: sekai (world) is cantonese (saekai)
Korean: junbi (ready) is cantonese (junbei)

These are just examples of their similarity.
Not to mention that japanese uses kanji and korean uses hanja, which is same as chinese/cantonese.

Cheers!