LangRead

LangRead swaps a controlled number of words in your book into the language you're learning, then leaves the rest in your reading language. You decide how aggressive the swap is, so a beginner sees a light sprinkling of new words and a stronger reader sees more. The point is to keep the text flowing while steadily raising how much of it is in the target language.

Any replaced word can be opened for its translation, a plain definition, and example usage. You don't have to leave the page or break your reading rhythm, which is what makes the in-context approach work. Keep the word if it fits, or send it back if you already knew it.

The words you accept while reading turn into flashcards, so review comes from books you chose rather than a generic list. That link between what you read and what you study is the part most language apps don't offer. It means your deck grows in step with the material you actually care about.

LangRead takes PDF, EPUB, and Kindle files, so you can bring books you already own instead of buying new ones. Support for the file types most people read on covers novels, manuals, and longer documents alike. You keep the original formatting rather than pasting raw text into a box.

The app shows how far you've read and which words you've collected, so you can see the vocabulary pile up over time. That feedback matters when the study happens inside something that feels like leisure. It turns scattered reading sessions into a visible record of what you've learned.

Everything runs inside the reader, from seeing a swapped word to saving it for later. There's no separate lesson to complete before you're allowed to read, and no daily streak to keep. That lower-friction setup suits people who want to learn without turning it into a second job.