Specific Domestic flights in Brazil are "Intercontinental", which means the flight has arrived from overseas and is constant devoid of clearing all travellers through customs and immigration. Nasalization is very common in many BP dialects and is especially apparent in vowels prior to /n/ or /m/ within the syllable onset. https://cyberzootopia.com/profile.php?action=view&do=profile&username=loreen-lohr_451693