Trying to make an exception for a stutter.

[CyaniideDrive]

I want to make a weir pack that will add a rule making it so a hyphen between two of the same letter will be accepted automatically by the spell checker.

Example:
Stuttering version of Hello would be H-Hello.

Can I get help with this here or should I go looking elsewhere?

[hippietrail]

I think rules can only add things to be flagged as errors and cannot exempt things from being flagged as errors.

This is the right place to ask.