You can attempt to manually set the language by editing the UserSettings.cfg file found in Documents\My Games\WRCG . Look for the line Engine.Locale.GameLanguage = "" and enter your language code (e.g., "en-US" for English). Changing Language on Console (PS4/PS5/Xbox)
Steam will automatically download a small localization update if the language files are not already present on your hard drive. Method 2: Editing the Epic Games Launcher Settings
Which (Steam, Epic, Xbox, or PS5) are you using?