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Before diving into the solutions, it helps to understand the problem. The original Sleeping Dogs (2012) and the Definitive Edition (2014) were released before multilingual in-game switchers became standard. Additionally, the Definitive Edition often detects your operating system’s locale or Steam client language at launch and locks that setting internally.
Look for a file named steam_api.ini or a similar configuration file. Open it with Notepad. Find the line that says Language=english . sleeping dogs definitive edition change language
Some language options may only change subtitles/menus, not voiceovers. For full audio changes, check if your language is fully supported. Before diving into the solutions, it helps to
Save the file ( Ctrl + S ) and close the text editor. Launch the game to check if the changes took effect. Look for a file named steam_api
If Steam’s language setting doesn’t stick, you can force it via Windows Registry: