Rapid improvements in the capabilities of machine translation (MT) raise questions about possible increases in overreliance on MT among lower-proficiency or novice level language learners. This study investigated how such learners described their use of online MT for independent reading and writing tasks, and whether this included descriptions of second language (L2) avoidance behavior. We also explored learners' reasons for using MT and the perceived effects on their language learning. Findings from in-depth interviews with eight second-year tertiary language learners suggest that using MT could exceed desirable use among such learners in relation to the language learning objectives, resulting in language avoidance. Although MT helped them in completing language tasks, its effects were perceived to be detrimental toward their abilities to express themselves in the L2. As such, the use of MT may lead to purely superficial language learning in formal language programs. These findings suggest language educators need to consider instructional scaffolding in language programs for such learners and guidelines to assist their autonomous use of the tool.