I tend to assign keyboard shortcuts to the services I use most often. Occasionally, I need to access one from the toolbar menu. When I dropped the menu down today, I noticed that some of the items were in Spanish. All of the aforementioned items seemed to be the core services - ones I had installed or built myself are still in English.
No idea how this happened. Please see the screenshot below.
Running 10.6.8 on a late 08 MBP. Cheers