The Spanish? I don’t understand. The international language of business today is English, a Germanic language - not a Romance language (like Spanish) or a Slavic language (like Russian). The course of European civilization was decided in 9 AD when the Germanic tribes defeated the Romans in Teutoberg Forest; the seeds were planted for the eventual Anglo-Saxon dominance of the known world, which reached much farther than Rome ever could. Northern Europe and the British Isles would eventually lead an industrial revolution that would reduce much of the world to raw material suppliers and customers.
Germany’s political class were Hitler’s puppets, and their military class was routinely ignored by Hitler. Many of the apolitical older German officers despised him, and he sacked good generals for petty reasons (losing their expertise).
English is a business language because one European power took over after another.
The global domination of European civilization was already a fact at the time.
And by the way Romans and Slavs are European too.