If this term is common in spanish speaking countries and if they have class action lawsuits I think it is worth. $xxx. Even with just the US market it may be worth that.
Yes. We have many class actions in Spanish speaking countries (maybe not as many as in the US) but we do have.
Legislations in many Latin American countries and also in Spain contemplate the use of this legal procedure (class action) and they do call it "accion de clase".
You can see results on legal sites from many Spanish speaking countries by searching "accion de clase" on GG.
I believe that even though the term is not used as often as in the US, hopefully, as people from the Spanish Speaking countries become more and more aware of their rights, the term and the legal procedure will be more and more known and used, and then, the domain might become a much more valuable one.