I have checked the logs of 20 big sites in as many languages. This is what I came up with:
Google has 80-94% market shares throughout Europe, so you can safely forget about local engines. In the following countries, there are local engines with measurable traffic:
Germany, Austria: t-online.de, aolsvc.de, web.de
Czech: centrum.cz, seznamn,cs, juxo.cz
Russia: Yandex.ru (almost as big as Google locally), rambler.ru
Denmark: Jubii.dk, eniro.dk
You should keep in mind, that some of the above may have Google onboard.
In the following countries, local engines (if any) do not produce measurable traffic, at least not that I have seen:
Hungary, Latvia, Lithuania, Estonia, Spain, Portugal, Italy (arianna.libero.it and virgilio.it a.k.a search.alice.it, are both Google-based).