When MW3 was manufactured for disc-based consoles, developers often pressed only one or two language tracks onto the Blu-ray/DVD to save space. For example:
By making language data optional, developers allow players to delete unused audio and text files, saving significant space on SSDs. Call Of Duty Modern Warfare 3 English Language Pack
Find and select Manage game and add-ons to find available language packs. PC (Steam) : Close the game and open your Steam Library . Right-click on Call of Duty and select Properties . Call Of Duty Modern Warfare 3 English Language Pack
Click the next to the Play button and select Modify Install . Call Of Duty Modern Warfare 3 English Language Pack