Google trends seem to be somehow – not so reliable

Comparing the two swiss cities of Bern and Zürich (http://www.google.com/trends?q=bern%2C+z%C3%BCrich&ctab=0&geo=all&date=all)
gives small villages as top cities and "rhaeto romance", an idiom spoken by about 40'000 people mostly as a second language as the top search language.

http://www.google.com/intl/en/trends/about.html#4
See what "normalized" means.