I don’t think it’s be very useful anyway. I think if you need it I can probably get someone to run it in NARIC for you, but it won’t really answer the question. I’d also say it’s generally for the employer to worry about equivalence, it’s not something an employee usually needs to worry about unless the job has really specific requirements. And unless she’s applying to be a spanish lawyer that’s probably not the case.
Konabunny and Martinhutch’s answers are good imo- that’s a reasonable way to list the qualification, I think it’s open for people to misinterpret but only in a positive way… It’s factually honest and I think the worst anyone could accuse it of is ambiguity; An employer can query it with her if need be. “Law with economics” to UK ears is going to sound a bit combined-studiesey and splintered.