It's a little more complicated than that - it uses an array of font names to pick one randomly. The tricky part is some fonts dont repsond well to the same font sizes as others; so there is some conditionals that will set acceptable font sizes based on the font filename.
If your font works in 18, 20 and 22; then you only have to add it to the array. Two of the fonts I have work with 12-22 ranges, so there are more size options for them.
I also pull random angles from an array which can be tweaked.
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