This study presents a review of the literature concerning the use of wikis as a tool for collaborative learning in the second language acquisition and foreign language learning process, as research on the use of wikis is relatively new. The study first introduces the theoretical background behind the use of wikis in the mentioned processes. Then, it reviews the studies concerning wikis as a tool for collaborative language learning. The study concludes that the use of wikis improves basic language skills, encourages positive perceptions of learning, increases motivation, provides opportunities to practice autonomy, and enhances inquiry learning and critical thinking, although they appear to have no effect on cultural proficiency. More importantly, Wikis appear to be an advantageous tool for improving writing, and may have additional benefits in developing literacy in multilingual contexts where access to minor languages in the educational process is limited. The paper ends with practical recommendations for teachers and researchers.