Greetings from GONIL Land, a far away place that is Dutchlandian's geocaching home away from home. When she was visiting here in GONIL Land recently, Dutchlandian left behind some mind-bending puzzles for us to solve. I thought I would return the favor.
Toss this Caesar Salad and see if you can find this cache that was hidden, with my deep appreciation, by 1ltmoos. (Cache placed with permission.)
WFFPI KWXXK BGGGT KNKKG WRPPC RCLKP NQPXF WEHKW VQQKG PJIRN
JTQLP VVTWP GVTHZ PQCPG VXFVZ WQFVI QKGKX NUGFG RPGIK PVPTP
The puzzle is in Dutch, not English.
Congratulations to JGeo for being the first to find!
New checker July 2020:
You can validate your puzzle solution with certitude.