For decades, parents and students have been told that the best way to learn a new language is to forbid the use of their mother tongue in the classroom. But is this "monolingual dogma" truly effective? Drawing on the work of linguist Wolfgang Butzkamm, we explore a powerful, evidence-based alternative. This post delves into why your child’s first language isn't a hindrance but is actually their greatest asset—a "Language Acquisition Support System" that provides the fastest and surest path to foreign language proficiency. Learn how a principled, bilingual approach leads to deeper understanding, less frustration, and more authentic communication.