Human language...not programmng language. I already know too many programming languages.
I'm trying to decide between French, German, or maybe Danish. I've read some on Old English and Old Norse; quite interesting. I had Spanish in High School and College, but I'm thinking of something else now.
Not trying to start a cultural war here. What's a good European language (other than English) to learn that's common amongst Europeans?
Other than English, there's no such language 'common' amongst Europeans. Sure, there are similarities in languages, 'language families' so to say. You have the Germanic languages (German, Dutch, English), Nordic languages (Danish, Swedish, Norwegian), Slavic languages (Polish, Czech, Bulgarian, Russian, Serbian), Uralic languages (Finnish, Estonian, Hungarian), Latin (Italian, Spanish, Portuguese, French) and Greek.
There are cross-side influences however. English and Dutch have both strong influences from the Nordic languages (from the Vikings and the Danes) as well as the Latin languages (mainly from the French, and the Latin origins of the European Christian church).
Though, throughout Europe, Latin has been anyway the most influential language of all.
But don't think you'll understand a Polish person when you have learned Latin, German or Russian.