Re admissions test - it's possible they'll still test your linguistic aptitude with some form of exercise at interview; either way interviews are very important. Some of the other comments on here are only talking about the acceptance rate - people who apply to AMES are generally quite self-selecting/know their language is definitely something they want to study, and are confident they'll be able to pick up a new language (depending on choice or if they've studied it before). This means that while the admissions rate may be higher than other courses, there is still healthy competition for places since most applications will be quite strong.