Google trends seem to be somehow – not so reliable

Comparing the two swiss cities of Bern and Zürich (google.com/trends?q=bern%2C+z% ...)
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.

google.com/intl/en/trends/abou ...
See what "normalized" means.