Duolingo recently launched an interactive feature that lets beginner language learners practice speaking through simulated video calls with an animated bear named Falstaff. While the educational technology company reports that the tool significantly improves conversational skills and boosts test scores, independent academic research suggests a more nuanced reality. Experts maintain that while artificial intelligence language tools are highly engaging, they are most effective when they supplement rather than completely replace actual human instruction.
What Happened
According to an internal report from the company, the new Video Call with Falstaff guides beginner French and Spanish learners through carefully scripted, low-stakes conversations. The primary goal is to help early-stage students confidently produce common vocabulary and memorize useful phrases. To evaluate the tool's effectiveness, the company tested the feature by comparing groups of learners who used the video calls against those who only completed standard text-based units. According to their internal speaking test, students who practiced speaking out loud with the animated bear scored noticeably higher when asked to translate and speak English phrases into their target language.
The Bigger Picture
While Duolingo’s internal findings are certainly promising for beginners, independent researchers are still evaluating how well AI conversational agents translate into long-term, real-world fluency. As we previously reported when Boston University researchers evaluated an AI reading tutor, the educational technology industry is actively racing to prove that AI tools produce sustained academic outcomes, not just short-term engagement.
Current scientific research shows a complex relationship between AI and student success. A recent clinical trial published in Communications Medicine found that while generative AI significantly increases user engagement—keeping users interacting with digital tools up to nearly four times longer—that extra time spent on an app does not automatically translate into statistically better cognitive or behavioral outcomes. Furthermore, students can lose their motivation when interacting with non-human systems. A study in Communications Psychology revealed that participants drop their emotional engagement levels and offer shorter responses when they are explicitly aware they are speaking to an AI rather than a human.
Despite these limitations, AI can still play a highly valuable pedagogical role if designed correctly. According to researchers at the Online Learning Consortium, AI tools work exceptionally well as "interlocutors" for structured role-play exercises, allowing students to apply new phrases in specific contexts like ordering food or conducting a basic interview. Similarly, a study published by MDPI indicates that AI chatbots are most effective when they use "dialogic feedback." This means the AI asks guiding questions that force learners to construct their own answers, which builds long-term knowledge retention much better than simply feeding them standard phrases to memorize.
What This Means for Families
For parents and educators, automated speaking tools offer a safe, low-pressure environment for beginners to make mistakes. Practicing pronunciation with an animated character completely removes the social anxiety and embarrassment of speaking a brand-new language in front of peers or a human teacher. This builds crucial early confidence.
Yet, families must view these tools as supplementary practice rather than complete instructional systems. As industry analysts at IntlPull note, AI systems excel at technical accuracy but still struggle to navigate the cultural appropriateness, subtle nuances, and unpredictability of genuine human conversation. To build true conversational fluency, students absolutely require human interaction. Clinical trials published in npj Digital Medicine reinforce this reality, showing that automated digital interventions achieve their best clinical and educational results when paired with brief, human-led support calls or check-ins.
What You Can Do
- Use AI for low-stakes practice: Encourage students to use automated video calls to drill vocabulary, practice pronunciation, and build confidence without the fear of human judgment.
- Mix app time with real conversation: Ensure your child or student is also practicing their newly acquired language skills with human speakers to learn vital cultural context and spontaneous dialogue.
- Focus on real-world production over screen time: Do not assume that hours spent engaging with a language app automatically equals fluency. Ask the learner to demonstrate their skills by having a brief, unscripted conversation with you or a native speaker.