Content Credits

English RankUp is built on many wonderful data sources and open-source tools. We'd like to credit:

Learning materials

• The vocabulary list is based on the CEFR standard (Hội đồng châu Âu / Center for Language Education and Cooperation).
• Example sentences, conversations, practice exams, stories and readings are written with AI assistance and automated quality review.
• IPA transcription generated with the CMUdict.

Technology

• Next.js, React, Tailwind CSS — the interface foundation.
• Mongoose + MongoDB — lessons and progress storage.
• Web Speech API — pronunciation and speech recognition for speaking practice.
• Icons: Lucide. Fonts: Noto Sans/Serif SC, Be Vietnam Pro, Inter.

Illustrations

• Illustrations in the TOEIC practice exams use the OpenMoji icon set — licensed under CC BY-SA 4.0.

Pronunciation

Pronunciation audio is pre-generated with native voices (English TTS), automatically falling back to the browser's voice when a clip is missing.

Report content issues

If you spot incorrect content or a copyright issue, please get in touch — we'll handle it as soon as possible.