Most language exchanges fail because the conversation defaults to English the moment Spanish gets difficult. Which is exactly the moment Spanish practice is most valuable. Set a hard limit: twenty minutes of strict Spanish, then twenty minutes of English. Timer on the table. No exceptions. Even better — you speak Spanish, they respond in English. Both of you focused entirely on production in your weaker language. Structure is what separates a useful exchange from an expensive English conversation. Comment SPANISH to build the exchange that actually works.