It’s not necessarily in a language you know, but I’ve put up two mysteries for Monster of the Week, based on the Mysteries Starter format, in French. Cause I’m french and cause the french version of the game is coming soon (well, 1d6 months). Here’s the first, a story in the bayou where ghosts cannot be put to rest.
http://www.drivethrurpg.com/product/228548/Pas-de-repos-pour-les-Majorettes