ispell-encoding8-command

ispell-encoding8-command is a variable defined in `ispell.el'.
Its value is

"--encoding="

• This variable may be risky if used as a file-local variable.

Documentation:
Command line option prefix to select encoding if supported, nil otherwise.
If setting the encoding is supported by spellchecker and is selectable from
the command line, this variable will contain "--encoding=" for aspell
and "-i " for hunspell, so the appropriate mime charset can be selected.
That will be set in `ispell-check-version' for hunspell >= 1.1.6 and
aspell >= 0.60.

For aspell, non-nil also means to try to automatically find its dictionaries.

Earlier aspell versions do not consistently support charset encoding. Handling
this would require some extra guessing in `ispell-aspell-find-dictionary'.