I was looking at a sprachbund called Standard Average European, which seems to include Germanic, Romance and Slavic languages. I will not list all the features here since they can be found on Wikipedia, but I am interested in the group of features which features can be seen as dividing SAE languages into two major groupings:
One the one hand we have group A, which includes English, Norwegian, German, Spanish, French, etc. And then we have group B, including Latin, Russian, Czech, Latvian
definite and indefinite articlesexist in group A but not in group B
a periphrastic perfect formed with 'have' plus a passive participleexists in group A but not in group B
verb-initial order in yes/no questionsexists in group A but not in group B
subject–verb–objectis generally unmarked word order in group A but not in group B
Group B languages generally have a much richer case system, which don't seem to syncretise prepositional and dative, and which seem to include other cases which are not found in Group A
I am sure we can find others. Do we have grounds for actually stipulating two separate sprachbunds here? Have linguists defined these and looked at this more closely?