app-text/gocr calls tkispell to spell-check it's current text buffer.
I would have contributed an ebuild, but unfortuaely I know nothing about perl CPAN modules or g-cpan, which refused `g-cpan -g tkispell`.
tkispell is from 2004 with no updates
One of its deps is Tk-SimpleFileSelect also from 2004 with no updates
* added dev-perl/tkispell
* patched it to work with aspell's ispell-aspell compatibility script (we don't have ispell anymore)
No idea if it works, but you got your wish. Perl out.