I have made a full set of 12 trolls, with quirks. most of them aren't very good, either simple letter replacements (such as u's for o's) or i end up making them way to complicated where every letter is replaced by some symbol. thre are a few I'm proud of, though.

Zhere's one Zha7 uses of sevens for T's and replaces a C, 7, or S followed by an h wiZh a 'ZH',

and one that finds any combination of three letters that could have an equivalent in algebraic chess notation and replaces it with such. the color of the pieces is random, which ideally leads to a 50/50 balance. B is bishop, N is knight, K is king, ect.