LNG - MAME Language File
This is a file type used as a language file for MAME. MAME is an acronym that stands for Multiple Arcade Machine Emulator which, in conjunction with accompanying ROM files, can emulate virtually any of the arcade machines produced in the 70's, 80's and 90's on a home computer. All popular arcade machine ROM files are available and with the proper hardware, a cabinet and controller setup can be built that will look and function exactly like a real arcade machine.
The LNG files are designed to 'translate' the language used on a MAME ROM from the native language to a target language such as Japanese to English. Many LNG files are included with the ROM dump, however LNG files are also available seperately. LNG files are not available for all ROMs and may cause errata in the emulation. Keep in mind all MAME projects, ROMs and LNG files are produced as freeware although copyright restrictions may apply from the original manufacturers.
The MAME emulator is available at http://www.mame.net. ROM and LNG files are available at various sites across the internet and full compatibility with the MAME emulator is not guaranteed.