aspell

Check a file

$ aspell check [file.txt]

$ aspell --lang=[es] check [file.txt]

$ aspell dicts

$ echo "speling errror" | aspell list

$ aspell --lang=[en] create master [./custom.rws] < [wordlist.txt]

aspell [options] mode [file]

aspell is a spell checker designed to replace ispell. It can check individual files, work as a pipe filter, or provide a C library interface for other programs.
The tool supports multiple languages, personal dictionaries, and has better suggestion algorithms than older spell checkers.

check file

Interactively check file

List misspelled words from stdin

Same as check (GNU ispell compatibility)

Language code (en, es, fr, etc.)

Parsing mode (tex, html, markdown, etc.)

File encoding

Additional dictionaries

Personal dictionary file

Ignore words ≤ n characters

Case insensitive checking

List available dictionaries

Dump dictionary information

Language dictionaries must be installed separately. Personal dictionary format differs from ispell. Some applications use hunspell instead.

aspell was created by Kevin Atkinson and first released in 2001 as an improvement over ispell, featuring better suggestion algorithms and Unicode support.

ispell(1), hunspell(1), spell(1)