Spanish TTS audio in the Mexican variant (es-MX) runs on two MAI Voice 2 voices: Alejo (male) and Valeria (female). Both produce neutral Latin American Spanish, the variety used in dubbing and broadcast media across Mexico, Central America, and much of South America. The pronunciation uses seseo (z and soft c pronounced as s) and the ustedes plural form only, dropping vosotros entirely. This makes es-MX voices the safer default if you are producing Spanish audio for a pan-Latin-American audience. Alejo and Valeria both support all eighteen expressive styles, giving full tonal range for narration, ads, and dialogue. Use cases we see most: YouTube voiceovers for the Latin American market, e-learning localization, Spanish-language podcast drafts, and pronunciation reference for English-speaking learners of Spanish. For the Spain market, switch to the Castilian (es-ES) page and use Marta.
Related: Spanish (Spain) variant available.