Define "territory".

Does India count? China? Russia? Spain? France?

India has tons of mutually unintelligible languages. China does too (some call them dialects). Spain has multiple partially mutually intelligible languages -- and Basque is an isolate (and mutually unintelligible). IIRC Occitan and French are not that compatible either.

> IIRC Occitan and French are not that compatible either.

Maybe you're thinking about the Basque language instead? I'm from the south of France, Occitanie really. Occitan is certainly different from French, but not completely alien. It's a bit similar to Spanish in closeness. Basque on the other hand is very different and is an isolated language.

https://en.wikipedia.org/wiki/Basque_language

I mentioned Basque, but Basque is in Spain.

No, I know that Occitan and French are not that different, but they're still pretty different. Like you say, similar to Spanish in closeness -- I would definitely consider them distinct languages that take effort to learn.

The Basque Country extends past the Pyrenees into France, there are lots of Basque speakers in France. France has historically shut down use of its minority languages, however.

Then consider not Spain, but its former colonies. In Paraguay, Bolivia, northern Argentina and some other countries it's common for people to speak two languages. The one native to the region and the one the conquistadores used.

In Africa it's the same thing, but the European language is more likely to be French than Spanish.

Now that's bilingualism.

Following your logic, any person speaking any two languages from English, Dutch, Icelandic, German, Swedish, Norwegian, Danish and lives in Northern Europe (smaller in land area than India or China) are not bilingual.

I was taught German in school and back when my memory of it was fresh I could, with some help, understand articles written in Norwegian, so yeah.

This sort of explains why Germans and Scandinavians in general are so proficient in english.