Llanai

Llanai is a language learning journal designed specifically for Japanese learners. You write about anything in Japanese, and the AI gives you sentence-by-sentence feedback — pointing out errors, explaining corrections, and tracking vocabulary based on your JLPT level. It's like having a patient tutor who reads every line you write and tells you exactly where you went wrong (and why).

Here's how it works: you write a journal entry, and Llanai highlights mistakes in real time. Click a highlighted sentence to see the corrected version and a plain-language explanation. The system also keeps a vocabulary list of words you've used and builds a review deck from your actual mistakes, so you're not memorizing random flashcards — you're drilling what you personally get wrong. The structured N5 curriculum gives you grammar patterns to study, reading passages, and writing prompts, all feeding into the same feedback loop.

This tool is best for self-study Japanese learners, especially those working toward JLPT N5 or N4. If you're tired of passive apps and want to actively produce language while getting targeted corrections, Llanai fits the bill. It's also great for supplementing a class or textbook — use it as daily writing practice to solidify what you've learned. The free trial gives you a week to see if the feedback style clicks with you.