1) Download the RAD Video Tools and install them.
http://www.radgametools.com/down/Bink/RADTools.exe

2) Download the packed file, extract the included script (using any program that can extract *.rar files) and save the script anywhere you like.
https://workupload.com/file/mYFequ3E

3) Open the script with an editor like notepad and change the pathname in the first line according to the path where your Syberia 2 bik files are stored (usually "Steam\SteamApps\common\Syberia 2\Video"). After that you need to change the audio track you want to extract by by changing the parameter /n0 in the first lines of the script.

Example:
BinkConv CIN00001_SybRecap.bik CIN00001_SybRecap.wav /v /n0
=> Extracts track 0 = german

BinkConv CIN00001_SybRecap.bik CIN00001_SybRecap.wav /v /n2
=> Extracts track 2 = spanish

BinkConv CIN00001_SybRecap.bik CIN00001_SybRecap.wav /v /n3
=> Extracts track 3 = french

BinkConv CIN00001_SybRecap.bik CIN00001_SybRecap.wav /v /n4
=> Extracts track 4 = italian

4) Save the script (using the same extension!) and run it through double click. A window will appear and you click start. After that process has ended close the window by clicking "close" and answer the question ("Save this RAD batch list?") with "no".

Now the cutscenes should have the correct audio.

If you like you can now delete all files using the extension "wav" in your video folder (only the ones stored there) since you don't need them anymore. You might also uninstall the RAD Video Tools.

I made this script for my own use because I was annoyed that the audio of my chosen language IS in the files but not in the game. So I only tested the script with the beginning of the game and I tested the script using all available languages (except english because english is always chosen). I cannot guarantee that this script is perfect and will not break your game - although I don't think it will. Aso be aware that after using this script the only way to switch the videos back to the english language you have to delete and re-download them (or use a backup copy of your video folder) because this script REPLACES the english track with the audio of your choice.

So use at your own risc and if you want to be safe make a backup of the "video" folder before using the script.

As I told in my guide to "Syberia" english is not my native tongue so I hope you understand everything in this guide. If there are questions feel free to ask them.