I've studied a foreign language, but studying abroad entirely in a foreign language sounds scary. What kind of academic achievement is expected of me?

Many study abroad programs offer special foreign language courses for program participants which are designed to be appropriate for the student's level of competency in that language (this will be stated in the eligibility requirements). Students who take regular classes in a foreign language alongside host-country students should expect a challenging academic environment and should be prepared to put forth extra effort in overcoming the language barrier. It is important to note that most professors understand the situation of international students and will usually issue grades and evaluate effort with a student's language level in mind.