This study seeks to validate the cross-cultural effectiveness of Emotionally Focused Couple Therapy (EFT) training in a sample of Spanish-speaking clinicians. The 28-hour formalized training for EFT was offered in six different Spanish-speaking countries, covering Europe, North America, Central America, and South America. Two hundred and seven therapists of 14 different Spanish-speaking nationalities completed pre-training assessments, 153 of them completed post-training assessments, and 92 therapists also completed the follow-up assessment. Using multilevel growth modeling, results indicated that therapists experienced significant and positive changes in terms of EFT competence (knowledge and skill acquisition), mature empathy, self-compassion, and attachment over time. Implications for transnational EFT training, specifically in Spanish-speaking countries, are discussed.