Regional locking is the most common reason. If you bought a cheaper key intended for a different country, that version may only contain that country’s language files. For instance, the often lacks English audio entirely, or the game is locked to Russian text/audio. Method 1: The Steam/Ubisoft Connect Official Way (Easiest)
Overview Far Cry 4 (Ubisoft, 2014) is an open-world first-person shooter set in the fictional Himalayan region of Kyrat. Language packs for games like Far Cry 4 are sets of localized audio, subtitles, and sometimes text assets that let players experience the game in different spoken languages and written localizations. They range from small subtitle-only files to large voice-over packages that include fully re-recorded dialogue and region-specific text.