LangTool is an open-source Fox Engine XML compiler/decompiler for Metal Gear Solid V: Ground Zeroes and Metal Gear Solid V: The Phantom Pain created by Atvaark. It is capable of reading the data from lng and lng2 files and converting them into XML files, where users may read and edit them. It can also do the opposite, converting XML files into lng/lng2 files.

Usage

To decompile a lng or lng2 file, the user simply needs to drag the file onto LangTool. To compile a decompiled lng file, the user simply needs to drag the lng.xml file onto the tool.

Dictionary

LangTool utilizes a dictionary of filenames called lang_dictionary.txt. As it decompiles the lng, it compares the hashes generated from this dictionary to any hashed keys it finds. If it finds a match, it will output the string by it’s real name with the XML attribute ‘LangId’. If it cannot find a match, it will output the string by its hash with the XML attribute ‘Key’.

The most current dictionary can be found here: https://github.com/TinManTex/mgsv-lookup-strings