Translation is fraught with dangers. Most English teachers in Spain are highly reliant upon translation in the classroom; often classes are a Spanish learning opportunity. There is a significant advantage to not using translation at all in the classroom and once you move to Asia and the Acia-Pacific region translation is not an option since most classes are multi-lingual. Avoiding translation increases the students exposure to specific chunks of language and improves the teacher and the students' communicative strategies.
It also avoids pitfalls you may never anticipate.