> Usage of a vocative-exclamative case. When nouns are in the vocative, the closing of post-tonic vowels (e into i and o into u) disappears and those vowels open. El Ramiru quíi venil (Ramiro wants to come), but Ramiro, ven pacá (Ramiro, come here!). Sé quién lo vidu, Pepi (I know who saw it, Pepe did), but Sé quién lo vidu, Pepe (I know who saw it, Pepe).
This is a charasteristic shared with the Fala language. Extremaduran and the Fala language are actually the only western Romance languages with a distinct form of vocative case for nouns formed with a change in the ending.