Op de Rockstar website staat:
Installing on a non-English, French, Italian, German, Spanish, or Russian Operating System
There is a known issue with non-English, French, Italian, German, Spanish or Russian operating systems, where unsupported characters will appear on the initial installation screen (this screen then remains present in the background throughout the installation process).
Click to see screen of error.
To bypass this issue and install the game:
Select the larger button at the bottom left of the initial installation screen and you will be moved on to a language select screen.
Select either English, French, Italian, German or Spanish and the rest of the installation will continue in that language.
At the end of the installation, the screen containing unsupported characters will appear again. Please select the button at the bottom left of this screen to progress to the Rockstar Games Social Club application.
The game can now be launched normally from the Rockstar Games Social Club application.
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