This paper reports on progress towards building an online language learning tool to provide learners with conversational experience by using dialog systems as conversation practice partners. Our system can adapt to users' language proficiency on the fly. We also provide automatic grammar error feedback to help users learn from their mistakes. According to our first adopters, our system is entertaining and useful. Furthermore, we will provide the learning technology community a large-scale conversation dataset on language learning and grammar correction. Our next step is to make our system more adaptive to user profile information by using reinforcement learning algorithms.

本研究旨在构建一种在线语言学习工具，通过使用对话系统作为实践对话伙伴，为学习者提供对话体验。我们的系统可以根据用户的语言熟练程度进行自适应，并且提供自动语法错误反馈来帮助用户从他们的错误中学习。根据我们的初步用户反馈，我们的系统既实用又有趣。此外，我们还将为学习技术社区提供一个大规模的关于语言学习和语法更正的对话数据集。下一步，我们将使用强化学习算法来使我们的系统更加适应用户个人信息。

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