How will the Spanish court enforce their decision abroad? I know there are agreements between te countries, but what happens practically after a decision? Who gets activated in the US to enforce the decision?
You can take the judgement to a US court and it will be a simplied process. As long as it is a "normal" country like spain it shouldnt be a problem (if the court was say an Iranian court it might be more difficult).
Most courts will see a contract + an enforceable undertaking from the country whose laws it was signed under and see that as roughly enforceable.
Doesnt mean always.