When translation becomes a crutch: rethinking L1 reliance in second language classrooms

Abstract

Teachers of second languages routinely face a practical tension: translation to learners’ L1 is fast, accurate, and reassuring—but is it good for acquisition? Building on nine years of teaching English and Spanish to Mandarin-L1 university students in China, this paper argues that frequent translation, especially when treated as the goal of listening or reading, can impede second language acquisition (SLA) by short-circuiting core psycholinguistic processes (input processing, form–meaning mapping, noticing, automatization) and by reinforcing lexical routes that keep L2 dependent on L1 mediation. Drawing on SLA theory (comprehensible input, interaction, noticing, input processing), bilingual memory models (the Revised Hierarchical Model), and cognitive load theory, we review evidence on classroom L1 use, code-switching/translanguaging, dictionary and gloss studies, and extensive reading/listening. The review supports a calibrated stance: low-frequency, purpose-bound L1 use can be facilitative (e.g., form-focused contrast, task setup, affective support), while habitual translation as comprehension produces shallow processing, low tolerance for ambiguity, and slower growth of direct L2–concept links. We synthesize these findings into a practical “Comprehension-First, Translation-Lite” pedagogy, including routines for monolingual support scaffolds, graduated glossing, noticing-rich tasks, and assessment designs that reward L2-to-concept processing. The paper concludes with actionable recommendations for instructors and program designers.