The one you choose. Pick Colombia, Mexico, Argentina, Spain or neutral Latin American (“General”), and your AI coach speaks with that country's accent, everyday words and manners. Lessons and role-plays are adapted too: vos with Sofía and Martín in Argentina, vosotros with Lucía and Javier in Spain, usted and ¿me regala…? with Camila and Andrés in Colombia.
The grammar is the same everywhere, so you'll be understood in any Spanish-speaking country. Not sure yet, or going to several countries? Pick neutral Latin American. The books and daily news are the same for everyone and are set across the Spanish-speaking world: Colombia, Mexico, Argentina, Spain, Peru, Chile, Cuba, Costa Rica and more.