Title: Building Polyglot App

Summary:
Polyglot App uses AI conversation, audio generation, vocabulary support, grammar feedback, and classroom controls to make language practice more flexible and adaptive. How an AI language-learning app turns practice into adaptive conversation. Language learning often comes down to practice.

Key Ideas:
1. The Practice Problem
2. Conversation First
3. Support While Learning
4. Personalized Settings
5. Classroom Controls

Permalink: https://aiaieducation.org/blog/polyglot-app

Full Post Body:

# Building Polyglot App

Language learning often comes down to practice. But practice is hard to sustain when every lesson is fixed, every prompt is prewritten, and every conversation has to fit inside a narrow scenario.

Polyglot App is designed around a different idea: language learning should feel more like actually speaking with someone. Built by Andrew Kwon, the app uses large language models, audio generation, and personalized settings to let users practice with a simulated native speaker in a way that adapts to their level, language, and goals.

Instead of only asking students to complete scripted exercises, Polyglot App gives them a place to start talking.

## The Practice Problem

Most language-learning tools are built around structured lessons. That can be useful, especially for beginners, but real conversation is not always structured. A student might want to ask about food, hobbies, school, travel, or anything else that comes up naturally.

The challenge is flexibility.

A learner may not always want to practice ordering food or asking for directions. Sometimes they just need a space where they can speak, make mistakes, ask questions, and keep going. Polyglot App is built for that kind of practice: open-ended enough to feel natural, but guided enough to still support learning.

## Conversation First

At the center of Polyglot App is conversation. Users can chat with the AI through text or use audio mode to speak directly and receive spoken responses back.

That matters because language is not only something students read. It is something they hear, speak, repeat, and adjust in real time. Polyglot App includes settings for voice speed, replay speed, microphone sensitivity, and silence timeout, allowing the experience to feel closer to a real exchange.

The app also supports scenarios for users who are not sure what to practice. A scenario can give the learner a starting point, while still letting the conversation develop naturally. Over time, those scenarios can become more complex, helping students move from simple tasks to more realistic interactions.

## Support While Learning

Polyglot App is not just a chatbot. It includes learning tools around the conversation.

A notebook lets users save unfamiliar words, review definitions, and bring vocabulary back into later practice. This turns vocabulary from something the user simply looks up once into something the app can reinforce over time.

For beginners, the app also includes a word bank. When a learner has trouble forming a sentence, the word bank gives them useful words they can use to build a response. This lowers the barrier to speaking, especially for students who are still developing basic vocabulary.

There is also a grammar tutor that can correct mistakes and explain them. Instead of treating errors as dead ends, the app turns them into moments for feedback. If a student does not understand the correction, they can ask follow-up questions directly inside the app.

## Personalized Settings

Language learners do not all need the same kind of support. Polyglot App lets users choose their language, difficulty, reading assistance, voice, nickname, and token usage mode.

For languages that benefit from reading support, such as Japanese, the app can provide help like Furigana. Difficulty settings allow the app to adjust the vocabulary and grammar it uses so that practice stays within the learner's level.

Even small personalization details matter. A user can set a nickname, and the AI can address them using that name in the target language. The goal is to make the experience feel less like filling out a worksheet and more like entering a learning environment built around the user.

## Classroom Controls

Polyglot App also includes an admin side. Admins can create groups, invite users, manage group membership, and control student settings such as language, difficulty, reading help, and low-token mode.

This makes the app useful not only for individual learners, but also for classroom or program settings. A teacher or administrator can keep students within the right language level, guide the type of support they receive, and view summarized analytics from student practice.

That combination is important: students get freedom to practice, while instructors still get structure and visibility.

## What It Adds Up To

Polyglot App uses AI to make language practice more flexible, accessible, and adaptive.

It gives learners a way to start speaking without scheduling a tutor, waiting for a response, or being limited to a fixed lesson path. It gives beginners support when they do not know what to say. It gives more advanced learners space to explore natural conversation. And it gives educators tools to guide the experience without removing the student's ability to practice freely.

The result is a language-learning system built around the thing students need most: more chances to actually use the language.