Systematic Orthographic Changes between Spanish and Portuguese
1. Orthographic Changes: Consonants
cua > qua dad > dade h > f ón > ão; ones > ões j > lh ñ > nh ll > ch, lh, l ñ > n ch > t n > nh ct > t loss of intervocalic /n/ ble > vel loss of intervocalic /l/ 2. Orthographic Changes: Vowels
ie > e (open timbre) ue > o (open timbre) ero > eiro; era > eira