Translation of "poco refinado" into English

Frederick, te recomiendo no inmiscuirte con jóvenes americanas que sean, como tú lo has dicho, poco refinadas.

Frederick, I think you had better not meddle with little American girls Who are, as you mildly put it, uneducated.

Sus técnicas para interrogar están poco refinadas.

His interrogation technique is a little unrefined.