### 5.8 Using Multi Dictionaries

As with previous versions of Aspell you can specify the main dictionary to use via the `-d` or `--master` option. However as of Aspell .32 you can now also:

1. Specify more than word list to use with the `extra-dicts` option.
2. Specify special multi dictionaries.

The `extra-dicts` is a list option. To add a dictionary use `add-extra-dicts` or to remove a dictionary from the list use `rem-extra-dicts`.

A multi dictionary is a special file which is basically a list of dictionary files to use. A multi dictionary must end in `.multi` and has roughly the same format as a configuration file with the only accepted key being `add`.