I believe LW installer normally brings up the language settings the Java has been using. Might I suggest you try re-installing LW. No uninstallation necessary. Use this installer: http://www9.limewire.com/download/LimeWireWin-full.exe and don't flip through the options of installer too quickly. It should have a question about which language to be installed.

If that does not work, try this technique: http://www.gnutellaforums.com/333278-post2.html which means also deleting the LW preferences. There might be an issue with your Java that is affecting LW. (not uncommon for Java to give LW problems!)