You're welcome.
@Joël: Thanks for adding the details.

Is it possible to change the savegame-folder?[woah] - I thought it's by default in "C:\Users\%userprofile%\Saved Games\Frontier Developments\Planet Coaster" and you can't change it.[shocked]
Btw. the location is completely in English, except "Users" - "Users" will be in your language.
@PlanetChris: to the best of my knowledge, it is not possible to change the default location of the saved parks (saved games) from within Planet Coaster. It is probably possible for people who have technical knowledge to change the physical location, either using a config file (if the game saves the default location in a config file) or by using symbolic links for the file system (only for technical experienced users).
However, now that I think of it, maybe the location of saved parks is
C:\Users\%userprofile%\Saved Games\Frontier Developments\Planet Coaster\12345678901234567\Saves only if you have previously installed an Alpha version of Planet Coaster (which I have) in order to separate the Alpha version parks from the beta/final release version parks. This is only an idea, I haven't tested it to see if it is true. If it is true, then the default location for players who have never installed an Alpha version would be
C:\Users\%userprofile%\Saved Games\Frontier Developments\Planet Coaster, like you have posted.
To make it more technical, C:\Users is physically named "Users", so if you paste the address in the address bar, it should work. Windows puts a virtual name on the "Users" folder based on the language of Windows, so it doesn't matter if you use C:\Users or a translated name of Users.
@gecaum: I'm interested to know if your problem can be solved. If you can't get the saved park to show up in the game (either putting the saved park-folder in
C:\Users\%userprofile%\Saved Games\Frontier Developments\Planet Coaster\12345678901234567\Saves or C:\Users\%userprofile%\Saved Games\Frontier Developments\Planet Coaster, and if all of the required files (see post of PlanetChris) are present in the saved park-folder, then it might be an idea to report it as a bug. You may want to add the saved park to the report (save it in a compressed zip-file and temporary share it on a file sharing website).
Please keep us posted on this issue. [happy]