How well will this handle Chinese?

[benjiwheeler]

I know that Chinese does not have the same density of spaces as English and most languages; a Chinese character is more analogous to an English word than an English letter.

Would you expect your classifier to treat Chinese characters as letters, or as words?

[toonimoadi]

Depends on your tokenizer.
By default it will tokenize Chinese characters as letters, but you can easily modify it with the following tokenizer

bayes({
    tokenizer: function (text) { return text.replace(/\s/g, '').split('') }
})