Assassin 39-s Creed Syndicate Localization.lang English Here
Unlike a standard .txt file, localization.lang is compiled. It is not meant to be read by humans directly out of the box. Instead, it is a lookup table. When the game engine needs to display a message (e.g., "Press E to air assassinate"), it queries the .lang file corresponding to your selected language.
Whether you are a modder trying to create a "Swear Like a Victorian" patch, a translator attempting to port the game to Catalan, or just a curious data miner, understanding the .lang file gives you a backstage pass to the code that made London live. assassin 39-s creed syndicate localization.lang english
(specifically the English variant).