Language Plateau is a concept that represents a phenomenon of a common problem in the language learning process that not many language learners are aware of its existence. This study is aimed to issue the concept of language plateau among language learners and educators by promoting the phenomenon using Brain-Based Learning principles to evoke participants’ curiosity. This study used a descriptive qualitative method for obtaining the data for the research by using Tests and In-depth interviews. The participants in this study are 10 students from the members of PBI UIN Walisongo 2016. Based on the findings and discussions, all the participants were indicated to hit the Language Plateau in their language learning process and have different roots of causals. The idea of Controlled Learning emerged to cover the founded root causes. The idea differs from the results of previous research due to the differentiation in the situation and subjects of the research.