I've seen this in most of the new versions, but LW runs fine in English on my OSX. The developers know about it, so don't worry.

As for the 3 times--don't know. The err.txt file refers to three locations:

Execute Custom Code
class com.limegroup.install.SettingsTranslator.install() Unexpected Fatal Error:
java.lang.NoClassDefFoundError: com/sun/java/util/collections/Set
at com.limegroup.install.SettingsTranslator.install(S ettingsTranslator.java:31)
at com.zerog.ia.installer.actions.CustomAction.instal lSelf(Unknown Source)
at ZeroGt7.run(Unknown Source)