fcheck has problems when directory names containing an exclamation mark
at the beginning of their name,
i.e. '!abc'.

See the following directory provided by the packages "espeak-data":
/usr/lib/x86_64-linux-gnu/espeak-data/voices/!v

Sample fcheck output:

As of now,
I did not check any other special characters and/or different
positioning.

Cheers,
Raoul