A learner corpus can provide useful data to detect specific difficulties of language learners and consequently inform the production of pedagogic material to address these problem areas. The USP Multilingual Learner Corpus will initially be built in English, German and Spanish. A heading with detailed information about the student (course level, age, sex, mother tongue, etc.) will allow for different types of research. The corpus’s multilingual character will make it possible to look into difficulties common to all Brazilian learners, irrespective of language. Its varied content may also provide insights into the effectiveness of different methodologies.