Hello Silvia Buehler Espiritu,
This is what ACE says, who is now accepted in Europe:
ACHIEVING APPROVAL IN EUROPE
Just as the NCCA sets standards for certification programs in the United States, EuropeActive (formerly the European Health and Fitness Association) sets standards throughout Europe. Using a standards council comprised of industry experts, employers, academics and practitioners from across Europe, the nonprofit promotes best practices at 48,000 facilities.
In 2012, ACE became the first U.S. certification provider to earn approval by EuropeActive. The designation means ACE Certified Personal Trainers and Group Fitness Instructors are eligible to join the European Register of Exercise Professionals (EREPS), the principle resource for hiring qualified health and fitness professionals in Europe.
Here are the links for you:
Personal Trainer~NAPS 2 B Fit…
You might want to look into getting a PT cert from PTA Global. NCCA accredited and recognized in many countries.
As Paul suggested, you could contact ACE and see if they have information about where their certifications are accepted. Generally speaking, it’s harder to get certified for fitness in Europe.