.EST_UAX File Extension
File TypeSpanish Unreal Audio Package
What is an EST_UAX file?
Audio file used by Unreal Tournament and other first-person shooter games that use the first Unreal Engine; similar to a .UAX file but contains audio clips for the game that are localized in Spanish; used for speech audio.
Other localized UAX audio packages use file extensions such as ".itt_uax" for Italian or ".frt_uax" for French.