Suno's pronunciation is trained mostly on English, so other languages come out with an accent — sometimes charming, usually wrong. You can get close, but it takes phonetic spelling.
1. Write it like it sounds in English letters. Don't write 'corazón' and hope — write 'koh-rah-SOHN' if that's how you need it sung. Phonetic spelling beats correct spelling every time for non-English lyrics.
2. Name the language AND the accent in Style: Latin pop, native Mexican Spanish vocalist, authentic pronunciation. 'Native' is the key word — it pushes the vocal model toward real pronunciation instead of tourist pronunciation.
3. Keep the lines simple. Complex poetic Spanish with subjunctives will get mangled. Short, common words survive; literary flourishes don't.
4. Test one verse first. Don't generate a full 3-minute song in Portuguese — generate 30 seconds, check the pronunciation, fix the phonetics, then commit.
5. The native-speaker check: if the song matters (a gift, a release), have a native speaker listen before you finalize. They'll catch what you can't hear.
Good luck! Hank founder of SonorixPG