Usages of registar
A treinadora pede inscrição para cada nova atividade e regista a presença num caderno.
The trainer (female) asks for registration for each new activity and records the attendance in a notebook.
Eu quero registar a minha inscrição hoje.
I want to register my enrollment today.
Elon.io is an online learning platform
We have an entire course teaching Portuguese grammar and vocabulary.