The same mnemonic letter is used twice (or more) in Java Control Panel->General tab:

1. es (letter "a")
http://bej301328.cn.oracle.com/gatejava/test/jdk2/results/7u25/b06/jre-x86-offline/winvista-es/1366312201.jpg
2. fr (letter "p")
http://bej301328.cn.oracle.com/gatejava/test/jdk2/results/7u25/b06/jre-x86-offline/winvista-fr/1366313588.jpg
3. it (letter "n")
http://bej301328.cn.oracle.com/gatejava/test/jdk2/results/7u25/b06/jre-x86-offline/winvista-it/1366314899.jpg
4. sv (letter "n")
http://bej301328.cn.oracle.com/gatejava/test/jdk2/results/7u25/b06/jre-x86-offline/winvista-sv/1366318897.jpg