PC (Steam)
1
First, head to the default installation folder of GTA V. ...
2
Open the GTALanguageSelect.exe. ...
3
Select a preferred language from available ones.
4
Click on "Update and Close" or "Update and Run" if you want to run the game immediately.
Open Rockstar Games. Select Grand Theft Auto V. At the right side double click "Language" and set it to en-US.