Userscripts.org

My first fan! For whatever that's good for :S There's a slightly better chance for a quick response if you post in this Feedback thread on the koohii forums: http://forum.koohii.com/viewtopic.php?id=342

Your keywords are saved in a file called prefs.js, on Windows that would typically be in C:\Documents and Settings\[your user name]\Application Data\Mozilla\Firefox\Profiles\[jumble].default\, where "Application Data" is a hidden folder, so you need to set your folder settings (Explorer -> Tools -> Folder Options, 3rd tab) so as to see it. Back up that file and you should be safe. Greasemonkey scripts themselves are stored in the gm_scripts subfolder.

You can also search the koohii forums for "prefs.js" for a different approach to locate this file: http://forum.koohii.com/viewtopic.php?pid=3380#...

To answer the second question, the script contains a list of spanish keywords, among them "estudiar". That probably triggered it.

If you would look at the include lines, you would see that it operates on kanji.koohii.com. Extract from this website's welcome page:

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The purpose of this website is to assist people who are studying the meaning and writing of the kanji (japanese characters) following James W. Heisig's method called "Remembering the Kanji".
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The method consists of linking a single keyword to each kanji and using mnemonics to reinforce the connection between the two. This particular script (a.o.) allows you to choose other keywords than the ones prescribed by the book or to study other kanji outside the book's scope.