The dictionary must be in the standard format for a Hunspell dictionary. These are standard text files, but with specific names and data format. Generally there are two files, <somename>.dic and <somename>.aff, and optionally a 3rd file for hyphenation. The <somename> is usually in two parts, separated by - or _ in the form of an ISO language code, such as en_US or en_GB. The data within the file also has a specific format. More information can be found on the web. Fo