Sources

English sentences

Sentences from the Tatoeba project, used under CC BY 2.0 FR.

Changes from the original: from the English dump dated 15 August 2026 we kept only the sentences suited to dictation, and wrote a new Korean translation for each. The translations are this project's, not Tatoeba's.

Word levels

Sentence difficulty is graded with the New General Service List (Charles Browne, Brent Culligan, Joseph Phillips), under CC BY-SA 4.0. The list itself is read as published, without changes.

The vocabulary estimate's frequency axis adds Paul Nation's BNC/COCA word family lists (Victoria University of Wellington) to the NGSL. The lists are read as published, unmodified.

Audio

Generated with Google Cloud Text-to-Speech Neural2 US English voices.

Pictures

Word pictures come from Wikimedia Commons and Openverse, under Creative Commons licences (CC0, CC BY, CC BY-SA) or the public domain. Each picture names its author, licence and source where it is shown. The pictures were resized and converted to WebP; they were not cropped or otherwise altered.