| Subject | English | Estonian |
| comp., MS | user interface language | kasutajaliidese keel (The language in which all software (including the operating system) displays its menus, help files, error messages, and dialog boxes) |
| comp., MS | user-preferred interface language | kasutaja valitud liidesekeel (A language selected by the user for viewing menus, dialog boxes, messages, and Help files. If none is selected, the system-preferred language is displayed) |