Setting speller from a shell script

Hello,

I know that a speller can be set in the nanorc as set speller "aspeller -x
-c"

However is it possible to set it from a shell script? I did a set speller
"home/findmarbles/spellchecker.sh" in the nanorc.

spellchecker.sh is a simple:

#!/usr/bin/env bash
aspeller -x -c

However when called from inside nano with Ctrl+T it throws out an error
asking for a file. Would be very thankful if you could help me out.

Thank you in advance