Spybot comes with all languages by default.
I propose the following:

1. in the installation file 'install all languages' is turned off by default. Windows doesn't install all languages by default along with all well known software.

2. If idea number 1 is dismissed then how about a drop down box/list thing with the caption 'Select language' and you choose the language you want installed with spybot.
Much more professional and well established.
That way not all languages are installed
Also if no language is selected make the 'Next' button invisible or faded and not possible to press until a language is selected.

Please vote on poll.