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Elizabeth Stein
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Case study

experimental2025

Pollyglot

AI-powered translation app using GPT-4o-mini for high-quality translations across 20 languages. Features automatic language detection, formality selector (neutral/formal/casual), alternative phrasings, pronunciation guides for non-Latin scripts, text-to-speech, voice input, translation history (last 50), CSV export, and dark mode.

Where wild ideas take flight and curiosity leads

Field notes

Role

Creator

Read order

Evidence first, then constraint → build → proof. Use the chapter rail to jump sections; orbit to adjacent work from the bottom of the case study.

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Evidence

Interface & evidence

A real surface area—not a mock. Scroll the story below for constraint, build, and outcome.

Signature viewpollyglot-topaz.vercel.app
Pollyglot application interface
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pollyglot-topaz.vercel.app

Story arc

How this shipped

Where wild ideas take flight and curiosity leadsThree beats: what pressed against the work, how the stack answered, and what changed once it was live.

I · Constraint

The brief

Most translation tools are either too basic (single output) or too expensive. Building nuanced translation with cultural context and audio in one clean UI.

II · Build

The craft

GPT-4o-mini provides alternative phrasings and formality-aware translations. Phonetic pronunciation guides for Arabic, Chinese, Japanese, Korean. Speech-to-text input, text-to-speech playback, auto-save history, CSV export.

III · Proof

What moved after launch

Covers 20 languages with formality awareness. Pronunciation guides make non-Latin scripts accessible. Voice input + TTS creates a full two-way conversation aid.

Inventory

Stack & signals

Next.jsOpenAIGPT-4o-miniInternationalization
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Tell me what you're building

If you need someone who can own UI, systems, and AI integration without losing the plot—I'm listening. Contract, advisory, or full-time: we'll find the right shape.

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© 2026 Elizabeth Stein

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