The position you are about to apply for is simply a conversationalist.

This is not a formal teaching position, however it is important to know what it is you are talking about.

You don't need to be a master of the Spanish language, but it will be very helpful to know what all the tenses mean because the more you know what you're talking about, the more you'll be requested and the more money you'll make.

This position does require you to have the ability to understand and speak English. If you don't have that ability, unfortunately you will not be considered for this position.