You can modify or replace the Aspell dictionary file. Use the admin?op=updateaspell operation for the dgraph which causes updates to the Aspell dictionary file.

While the dictionary files automatically generated by Dgidx are generally adequate for most applications (especially when using a reasonable value for the minimum number of word occurrences), additional improvements in application-specific spelling behavior can be achieved through modification or replacement of the automatic dictionary file (Aspell module only).

For example, in applications with a specific set of technical terminology that requires focused spelling correction, you can replace the automatic dictionary with a manually-generated list of technical terms combined with a simple list of common words (such as /usr/dict/words on many UNIX systems).