Follow the steps below, please: 

  1. Please, locate your game's installation folder.
  2. You should see folders named DW, DW_DLC1, DW_DLC16 and DW_DLC17 
  3. Inside each of these folders, delete the data packs that aren't listed in the language that you desire. (For example: DataBr (folder) + DataBr.pak)
  4. If you see only the folder, but not the .pak file, delete the folder anyway and move on, please.
  5. Try launching your game after removing all of the data packs that you don't wish to use.