AI language tutor: practice the language you’re learning, by chat

You know the words, but the sentences don’t come

Years of high school Spanish, a long streak in a language app, a few trips. You can read a menu and follow a show with subtitles. Then someone speaks to you, or you need to write a message, and you freeze. You look for the word, translate the sentence in your head, and the moment has passed.

That freeze usually has three causes. First, there are few chances to practice: not everyone has a conversation partner nearby. Second, the fear of making mistakes in front of someone holds back even people who have the level. Third, many lessons and apps teach words without giving you room to build your own sentences.

An AI conversation partner removes the first two obstacles. Oliver is available when you are, at 11 p.m. or on the train, and he doesn’t judge. You can make the same mistake five times, or ask the question you never dared to ask in class: why is it “estoy cansado” but “soy alto”? The third obstacle is up to you: writing real sentences in the language.

What Oliver does (and what he doesn’t)

Oliver favors practice over long grammar lessons. He can:

• chat with you at your level, with simple sentences if you’re a beginner;
• play out a scene: ordering at a restaurant, checking in at a hotel, a phone call, a job interview, a meeting;
• correct your sentences and explain each correction in English, in a line or two;
• teach vocabulary in context, in a useful sentence, rather than in a list of thirty isolated words;
• create exercises and quizzes for your level;
• explain a grammar point simply, with examples.

During a conversation, he corrects what matters: the mistakes that get in the way of understanding or that keep coming back. He doesn’t stop you at every word, or the conversation would stall, and his recap fits in two or three points. If you want a full correction, of a text you’re about to send for instance, just ask.

What he doesn’t do:

• You can type or talk to Oliver with the chat’s microphone, but he always replies in writing: no spoken answers, and no score for your accent.
• He doesn’t give you a certified level and doesn’t replace an exam like the DELE, the DELF or a Goethe-Zertifikat.
• He doesn’t promise to erase your accent or make you fluent in a few weeks. Your progress depends on your practice.
• Like any AI, he can make a mistake, or offer one correct phrasing among several. For less widely taught languages, double-check important points with a textbook or a native speaker.

Corrections that explain the rule

A translation app gives you the right sentence. Oliver gives you the right sentence and the reason behind it, so you don’t make the same mistake next week. A few typical corrections for English speakers:

• Spanish. Before: “Soy aburrido en clase.” After: “Estoy aburrido en clase.”

With aburrido, ser describes a trait (soy aburrido: I’m boring) and estar a state (estoy aburrido: I’m bored).

• French. Before: “Je suis 25 ans.” After: “J’ai 25 ans.”

French gives your age with avoir (to have), not être (to be).

• German. Before: “Ich bin heiß.” After: “Mir ist heiß.”

To say you feel hot, German uses mir ist heiß. Ich bin heiß means something else entirely.

You choose how much he corrects. “Only fix the mistakes” keeps your text almost as is. “Make it sound natural” shows you how a native speaker would say it. “Change as little as possible” suits a personal message. For a message to a colleague or a host family, mention the tone too: formal or casual (tú or usted, tu or vous, du or Sie).

How to talk to Oliver

You don’t need a perfect request. Three things are enough: the language; your level, even a rough one (“total beginner,” “high school Spanish,” “B1”); and what you want to do now: chat, get a text corrected or practice with exercises. You can write in English or in the language you’re learning. If it gets too hard, say so: Oliver makes it simpler instead of pushing.

3 requests ready to paste

1. Everyday conversation: “I’m a beginner in Spanish, around A2. Let’s talk about my weekend in simple Spanish, one question at a time. Correct me only at the end, in English.”
2. Text correction: “Correct this French text. Give me the corrected version, then explain the three most important mistakes in English. Keep my style. Here’s the text: …”
3. Targeted exercise: “Give me eight fill-in-the-blank sentences in German on the dative after mit, bei and zu, level A2. Wait for my answers before correcting them.”

Instructions that change the session

A few words are enough to set up the exchange: “one question at a time,” “correct me at the end,” “translate only if I’m stuck,” “give me two ways to say it, a simple one and a more natural one.” The last one helps when you understood the correction but want to sound less like a textbook.

Practice for your situation

Before a trip

Play out the scenes you’ll actually live: ordering, asking for directions, sorting out a booking problem. For example: “You’re a waiter in a tapas bar in Seville. I’m ordering for two, and one of us is allergic to nuts. My level is A2; start the scene in Spanish.” Oliver also gives you the polite phrases locals use: “Quiero un café” is correct, but in Spain you’ll more often hear “¿Me pone un café, por favor?”

For work, interviews and meetings

Prepare the questions that come up most: introducing yourself, describing your experience, explaining why you want the job. Ask Oliver to ask them one at a time, then to flag the sentences that sound translated from English. He suggests a more natural version that keeps your ideas.

Before an exam

For the DELE, the DELF or a Goethe-Zertifikat, practice the writing tasks and speaking topics: Oliver can play the examiner and give you feedback on structure, vocabulary and grammar. Use the exam’s own sample papers alongside.

Getting back to a language after years

Start again with simple topics you enjoy: food, football, the series you’re watching. Ask for a quick refresher on a point you’ve forgotten, such as the passé composé versus the imparfait in French, then use it right away in the conversation.

Learning English

Oliver also coaches English learners, with corrections explained simply. Our article Practice speaking English with Oliver shows a full session.

How long does it take?

The US Foreign Service Institute estimates the class time English speakers need to reach professional working proficiency: about 24 to 30 weeks for Spanish, French or Italian, about 36 weeks for German, and about 88 weeks for Arabic, Chinese, Japanese or Korean. Those are full-time classes. For most learners, what matters is regular practice: a short session several times a week keeps the habit alive better than a long one now and then.

Short exercises at your level

Oliver creates exercises suited to your level and goal. A few formats that work well:

• fill-in-the-blank sentences on one grammar point;
• five sentences from your day to translate, then compared with his version;
• rephrasing: saying the same idea more simply, or more politely;
• a vocabulary quiz on a topic you like;
• irregular verbs in full sentences rather than in a list.

Answer before asking for the correction: the effort of searching is what makes things stick. If your course notes are in a PDF, our MCQ generator from a PDF can turn them into a quiz.

How to use Nation AI on this page

The chat is at the top of the page, with Oliver’s photo: type your first message, or say it with the microphone, and the conversation starts. Oliver replies in writing. There’s nothing to install and no account to create for the trial.

You can paste a text to correct, or send a screenshot or a PDF: an exercise, a message you received, a page of notes. Oliver works on it directly. Nation AI runs on GPT models, with Mistral as a backup; it’s an independent service designed in France, not affiliated with OpenAI.

Oliver is one of Nation AI’s 25 AI coaches. To translate a whole document rather than learn, Clara, the translation assistant, or our page to translate a PDF are a better fit.

Pricing: free trial, then paid plans if you need them

The trial is free, with no sign-up: no account, no email, no card. A few messages are included, enough to try a conversation or a correction with Oliver. For regular use, commitment-free paid plans are available: see the pricing page for details.

Good habits to really progress

Write it yourself first. If you run your sentence through a translator before sending it, Oliver corrects the machine, not you. A clumsy sentence of your own is worth more.

Practice often, a little at a time. Short sessions several times a week build reflexes better than one long session now and then.

Keep your mistakes. At the end of a session, note the two or three points from the recap and paste them into your next first message: “Last time I mixed up ser and estar. Watch for it.”

Ask why. A correction that surprises you deserves a question. Understanding the rule is what stops the mistake.

Raise the level gradually. When a scene gets easy, ask for a faster speaker, idioms, or an impatient customer.

Protect your information. Before pasting an email or a document, remove names, numbers and sensitive details.

Useful links on nation.ai

• Practice speaking English with Oliver: a full session for English learners.
• Oliver, AI teacher and language coach: his profile.
• Clara, AI translation assistant: for translations.
• AI to translate a PDF: for a whole document.
• MCQ generator from a PDF and flashcards from a PDF or a photo: to review your course notes.
• 20 best prompts for students: more ready-made requests.