[jmnicolas]

If you can speak German that is ...

[xyzzyz]

Or actually, Swiss German. Most people in Germany don't even understand Swiss German.

[acoster]

There are French and Italian speaking regions too (well, there's Romansh, but that's tiny).

But in all seriousness, in the main cities you can get by speaking English.

[noncoml]

Get by as in find a job without speaking a word of French or German?

[sawmurai]

While speaking either German, French or Italian certainly helps english is more than enough in most jobs. In IT most stuff we read / discuss online is in english anyway.