The writers and localization teams had to ensure that the dialogue felt accurate to the era without becoming incomprehensible to modern players.
Close your game client (Steam, Epic Games, or Ubisoft Connect) completely.
If the game keeps reverting to Russian or another language, you can manually remove the foreign language data to force the English backup. Sound Data: \sounddata\PC\ . Keep all files with in the name and delete (or move) those with or other tags. Video Data: . Keep the folder and delete the others. Reset Localization: Delete the localization.lang