I do not know how serious the problem is for the incorrect guest thought. I have not tested that. But I suspect the problems are minor enough to live with. For the food/drink problem, the worse that would happen is some guests would go to the stand several times in a row before their need is met. However, if you want to fix these problems and you are very familiar with unzipping and rezipping files, the steps to fix it would be:
1. Create a "frituur" folder somewhere that is not inside any Zoo Tycoon folder.
2. Unzip frituur.ztd into that folder.
3. Open 730BE026.ai (which is in the building subfolder within the scenery subfolder) in NotePad.
4. Change "cHungerChange = 0" to "cHungerChange = -100". Change "cThirstChange = 0" to "cThirstChange = -100". Remove "cUsedThought=10080". Save the changes and exit NotePad.
5. Rezip everything in the "frituur" folder into a new frituur.ztd.
As for English messages, that requires a ".dll" file, which is somewhat difficult to do. The best is to wait for the ".dll" update. The building can still be used without the messages.
As for the Download Directory site, the owner has been busy with the holidays and other real life things. I do not know when it will be back online. Hopefully it will be soon. However, the ".dll" update is not there yet.