Easy access
The buttons are available on the ribbon menu.

Customization
It can be customized to your needs.

Katip is an add-in designed to enhance spellchecking capabilities in the Microsoft Word desktop application using the Hunspell library and dictionaries.
Many languages around the world lack built-in spellchecking functionality and are not supported by major software vendors. The goal of this add-in is to integrate Hunspell's robust spellchecking features into Microsoft Word, thereby enabling spellchecking for low-resource languages.
You can download installation files from Github repo
The buttons are available on the ribbon menu.
It can be customized to your needs.