| Subject | English | Polish |
| comp., MS | Multilingual User Interface | wielojęzyczny interfejs użytkownika (A technology that allows for the installation and use of multiple user-interface languages) |
| comp., MS | Multilingual User Interface Pack | pakiet wielojęzycznego interfejsu użytkownika (A set of language-specific resources for multiple supported languages. MUI technology enables users to set the user-interface language according to their preferences, provided the required language resource files are present on the computer. It is designed to enable large corporations to deploy a single version of Windows worldwide, while enabling their local users to select the user-interface language) |