Francis Deblauwe of Word Face-Off (“Comparing the evolution in
internet-popularity of words and phrases”) has had the excellent
idea of comparing the popularity of multilingual synonyms in
multilingual countries in this post, “Library vs. Bibliothèque
vs. Bibliotheek vs. Bibliothek in Canada, Belgium and
Switzerland.” A sample finding:  In Canada, approximately 75% of
the population speaks English and 25% French. When doing a
Google Insights for Search test for the same word in both
languages, limited geographically to internet users from Canada,
one would expect to see proportional Google-popularity. For
instance, we would expect to find library and bibliothèque in a
75%/25% proportion. Instead, the actual overall proportion
(2004-present) was 94%/6%. Odd! However, the second test with
bookstore/bookshop and librairie came out with a perfect 75%/25%
split. I would guess that this inconsistency might have
something to do with a too limited data set for Google searches
in Canada, rather than a cultural distinc