The ODbL license is not compatible with the Creative Commons license. (1) I know about their goal, and I also know that they are eager to collaborate with OpenStreeMap. So they would the sue. (2) I think it is the Database Directive of the EU which protects the databases, even if it is made of factual information.

To be more specific about my case, I wanted to import into OpenStreetMap the latin names ("romaji") of places from Wikipédia. But I had to check if it was allowed around the world. I read that in Australia it is not a problem, but it is hard to know about the rest of the world.