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Adding Custom Spell Check Term Lists

You can create personalized term lists that are used to store specialized terms or control forbidden words. They can then be added to one of the directories that store the spell check dictionaries, and the spell checker will merge them with all the dictionaries and other term lists for a particular language.

Create and Add Personalized Term Lists

To create and add a personalized term list, follow these steps:

Create a term list file (with the .tdi file extension). The name of the file must begin with a two letter prefix that indicates the language it should be attached to, followed by an underscore or hyphen, and then a descriptive name (for example, en_US_myterms.tdi for term list in the US version of the English language or en_myterms.tdi for a less specific English term list). For a list of language codes, see https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes.
In the term list file (.tdi extension), add the terms you want to be included in your custom dictionary. If you need to specify forbidden terms, those words simply need to be preceded by an asterisk. Add one word per row, as in the following example:
```
     parabola
     asimptotic
     *hyperbola
```
Note: Words stored in term lists are not handled as case-sensitive. Therefore, you do not need to include both uppercase and lowercase versions of the words.
Open the Preferences dialog box (Options > Preferences) and go to Editor > Spell Check > Dictionaries.
Choose one of the following two options for saving the file.
1. Save the file (.tdi) to the default directory displayed in the Dictionaries and term lists default folder option.
2. Save the file (.tdi) to any other directory, select the Include dictionaries and term list from option, and select that directory. If you choose this option, make sure you read this important note.
Restart the application for the spell checker to start using the new term list.