File extension .MUI
Full Name | Developer | Category |
---|---|---|
MultiLanguage Windows Resource Format | Microsoft | System Files |
The MUI file extension is a type of language resource file used to modify the Windows Operating System. It contains multiple files with strings of text, images, and other information. These files are used to define translations for the spoken and written languages in the different versions of the operating system. The MUI files change the presentation, formatting, menus, et cetera of the OS depending on the language being used.
Structure
The MUI file is composed of several sets of specific folders that contain different types of files. It also contains an array of folders for each language version that is included in the file. These include language-specific resources, such as icons, audio files, and message catalogs. Additionally, it may include UI resources, such as a language-specific DLL or a LIP.
Additional Features
The MUI allows users to enable multiple languages on the same Windows computer. For instance, in some Windows versions you can enable English (United Kingdom) and French (France) at the same time. It also allows users to switch between the languages while working on their computer. Additionally, with the .MUI files you can easily upgrade to any language by simply enabling or changing its settings.
Similar File Extensions
Other similar type of language resource files include:
Programs for WINDOWS system
After installing the required software, the operating system will usually automatically associate an unknown file type (in this case .MUI) with the new application. If this does not happen, we can help the system a bit by selecting the software for it, which it should always use to open files with the .MUI extension.
When choosing the software we can select the system to use this software every time.
Remember!
Using it for the first time it is good to check whether the .MUI file opened in the application can be read by us and opens in a way that allows us to use it. If everything is in order, select this option the next time you open a file with the .MUI extension. However, if the file has not opened correctly, we have to look for a different software, with which we can open files with the .MUI extension. Select a different software from our list and install it on your computer. After the software is installed, repeat inspection openings of a .MUI file. Sometimes you have to repeat the operation several times.
Other instructions
If none of the programs listed by us to work with the .MUI file has not meet your expectations, you can try searching other websites. But remember to avoid downloading programs "that can open any file". These applications not only have very limited functionality, but may also expose you to expense tens of dollars when purchasing a license.
In the vast majority of cases you will find the program dedicated to support the .MUI file, or any other file format. In addition, there is a chance that it will be a free program, and its functionality (concerning the .MUI file) will be extended to the maximum.
It is also good to check
- if the .MUI file has no errors
- or if it has been copied (or downloaded by the browser) thoroughly
Author’s guidelines

Mr B. Adam
Author of the guidelines / Founder of FileExtension.info
New technologies enthusiast, helping to solve problems with the files.
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