The reason that you have to practice a lot every single day

The reason we can understand a foreign language when we read it but struggle to express it when speaking is that comprehension and speaking involve different parts of the brain. The Broca’s area handles speech production, while the Wernicke’s area manages understanding. These two areas are connected but function separately. So, even if you understand a language well through reading or listening, speaking requires practice and activating the speaking-related parts of the brain. This is why regular practice is essential to becoming fluent in speaking a foreign language.