Koboshi

The Koboshi blog

Notes on memory and languages.

How vocabulary sticks, how multilingual minds connect their languages, and how to make the words you meet stay.

Story August 17, 2026 · 4 min read

Why I built Koboshi

Why I built Koboshi

I kept losing words I had already looked up, and this is the app I built to retain them. Research June 1, 2026 · 6 min read

Why you understand Spanish but can't speak it

Why you understand Spanish but can't speak it

Recognizing a word and producing it are two different skills. Here is what the research actually says about the gap, and how to train it.

Reading is good. Remembering is better.

Turn the words you meet into words you keep.

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