Cantonese but with Vietnamese phonetics (works better with Southern dialects).
Copy the Chinese characters and paste onto the left side to reveal the Vietnamese readings. If you directly type in Cantonese, make sure you leave spaces between words (or characters; check for punctuation marks as well) as I haven't figured out the way to translate texts without spaces yet.
Oh and leave suggestions, be it positive or negative. RegEx lessons are also appreciated. :)