Using AI to learn a language — without letting it learn for you

An AI assistant is the most patient conversation partner you will ever get, and the easiest way ever invented to not learn anything. Both are true, and which one you get depends entirely on what you ask it for.

The rule that sorts it: make it produce the input, never the output. Its job is to give you things to work on. Your job is the work.

What it is genuinely good at

Infinite graded input. "Write me eight short paragraphs in Lithuanian at A2 level about taking a bus, each with one past-tense verb" is a task no textbook can do on demand and no teacher has time for. This is the killer use: as much material at exactly your level as you want.

Explaining an answer you already got wrong. Not "what does this mean" but "I wrote *namie* and the answer was *namuose* — what distinction am I missing?" You bring the error; it supplies the rule. That order matters.

Drilling one pattern to exhaustion. "Give me fifteen sentences with a gap where a preposition + genitive should go. Do not show the answers." Then mark yourself.

Being wrong at you on purpose. "Write five sentences, three correct and two with a case error, and do not tell me which." Finding the mistake is a different and harder skill than avoiding it, and it is what proofreading a written paper actually is.

What to never ask it for

Your written task. Obvious, and worth saying: the exam will ask you to produce text unaided, and every paragraph it writes for you is a rep you did not do.

A translation you could have worked out. The thirty seconds of struggle before you look something up is most of where the learning happens. Look up words, not sentences.

A grammar rule you have not tried to apply yet. Reading an explanation feels like understanding. Attempt first, explanation second — and the explanation lands somewhere it can stick.

The trust problem

For a well-resourced language, a good model's everyday grammar is usually reliable. For a smaller one — Lithuanian very much included — it is confidently wrong often enough to matter, especially on stress, on rarer case forms, and on which preposition governs what.

So treat generated sentences as practice material, not as ground truth. If it tells you something surprising about a rule, check it against a real grammar or a real teacher before you learn it. A fluent wrong answer is more dangerous than an obviously wrong one, and this is exactly the kind of mistake that arrives fluently.

A fifteen-minute loop you can run tonight

  1. Ask for eight A2 sentences on one theme, with no translation.
  2. Translate them yourself, on paper. Do not paste them back.
  3. Now ask for the translations and mark your own.
  4. For each miss, ask what distinction you missed — not for the rule in general.
  5. Ask for five new sentences targeting exactly that distinction.

Step 2 is the entire exercise. Everything else is scaffolding around it.