You will find "There are 6 translations, ..." and a [b]selection list[/b], the last one is your translation, if you view [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=398.0]Projectile Orbits and Satellite orbits[/url] again.

Select the list you have select , and you will find translated result.

About the Strings need to be translated in the simulation. I forgot to add those parameters in the applet tag.
I just added those. Please click the translation button again.
You will find a table for you to translate those strings. (check out the following attached image file)
Please do the translation and download it again!

You are welcomed to check out [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=100.0]Translate Strings into local language format[/url] if you want to do it manually.