Only Randomize Non-Alphanumerical Characters Option

[hatfielddr]

Is your feature request related to a problem? Please describe.
Using the "No Randomization" option replaces unsupported characters with empty boxes

Describe the solution you'd like
I'd like the opposite of the "Only Randomize Alphanumerical" option to allow to only randomize potentially unsupported (i.e. non-alphanumeric) characters

Describe alternatives you've considered
Alternative could be to simply make the No Randomization option do this by default

Additional context
I like to use the No Randomization option to allow my players to learn to read the languages overtime (in a metagame sense) and the boxes break immersion a little.