language problem in java drop-down menu

dear sirs,

i encountered a strange behaviour whilst stting up a website based on "theme20 (TemplateSet theme0 ZMS 2.0)" using "MenuScript.js (Menue: JavaScript-DIV)" in order to create drop-down menus. the problem is that only links for the primary language (eng in this case) are presented, i. e., although if ger is selected, all menus but the drop-down are in german. therefore, selecting any link in the drop-down menu leads to the respective english menu and unintentionally changes the language.

this behaviour can be observed here: http://lkas.de:8080/CECAD/content/index_ger.html

any hint about what to change in "MenuScript.js" (which you can find in the attachment) to make it work correctly and present the correct language will be greatly appreciated, since it shall save my xmas-vacation!

tia & merry xmas!