If you use the popular megamod, language settings are often handled differently. TWoS typically requires the game to be installed in English with German voices selected during the initial install to ensure the mod's custom interfaces work correctly.
can be done through client settings or manual file swaps , depending on whether you want to change the text (UI) or just the crew voices for immersion. Changing Language via Game Clients silent hunter 5 change language
Ubisoft’s decision to tie language to the game’s registry key and launcher profile—rather than an in-game option—is the root cause of this confusion. If you use the popular megamod, language settings