Somewhere around your third month of learning a language, Duolingo stops feeling like progress and starts feeling like a chore you can't quit. You've maintained your streak. You've earned your XP. You can match pictures to words in a language you still can't speak during a real conversation.
The problem isn't Duolingo specifically. It's the model: gamified repetition of pre-set content, with engagement mechanics built to keep you in the app, not necessarily to close your actual vocabulary gaps. By 2026, a wave of AI-powered apps has moved beyond this model. Some are genuinely better. Some just look like they are. This post breaks down what they're actually doing differently.
What "AI language learning" actually means
The phrase gets attached to a lot of things. Some apps use AI for conversation simulation. Some use it to generate audio or images. A smaller number use it to figure out what you personally don't know and build content around that gap. These are three very different approaches, and they produce very different results.
The distinction that matters most for intermediate learners: are you working through content the app designed for a generic user, or content the app generated because of something specific about your learning history? Generic decks and generic courses get you to B1. After that, your gaps are personal. The words you know, the ones you keep confusing, the structures that don't click yet -- those differ from everyone else at your level. An app that can't account for that will plateau you.
Speak
Speak is focused on speaking practice, which is the thing most vocabulary apps ignore completely. The app uses AI to simulate conversations, give feedback on pronunciation, and correct grammar in real time. If your bottleneck is that you've built vocabulary you can't actually produce under pressure, Speak is worth trying.
The limitation is that Speak is built around speaking, not vocabulary acquisition. It won't systematically close lexical gaps. If you don't know a word, the conversation simulation will expose that, but the app won't build a targeted review schedule around it. It works best as a complement to a vocabulary tool rather than a standalone solution for someone trying to move from B1 to B2.
Pricing sits at roughly $8-12/month depending on plan. Available for iOS and Android. Currently supports English, Spanish, French, Japanese, and Korean.
Pimsleur
Pimsleur has been around since the 1960s, and its core method -- audio-based, spaced repetition, heavy on speaking from day one -- still works well for beginners and early intermediates. The app version adds some vocabulary exercises and a light gamification layer on top of the original audio lessons.
What Pimsleur doesn't do is adapt to you. The lesson sequence is fixed. You go through it at Pimsleur's pace, in Pimsleur's order, regardless of what you already know. For someone starting from zero, that structure is reassuring. For someone at B1 who already knows 60% of the A2 content, it's slow and a bit patronizing.
It's also expensive -- around $20/month for a single language, or $150+ for premium access to multiple languages. The audio quality is genuinely good, and the method has decades of research behind it. But you're paying for a course more than an adaptive system.
Anki (with AI add-ons)
Anki is the base layer that a lot of serious language learners still use, increasingly supplemented by AI tools that generate cards from text, images, or prompts. The spaced repetition algorithm in Anki is still one of the most rigorous available. The problem, as always, is the setup cost and the lack of native AI generation.
Third-party tools and ChatGPT integrations have made it possible to generate contextual Anki cards from source material, but it requires technical setup and ongoing maintenance. For learners who are comfortable with that, the combination of Anki's scheduling and AI-generated contextual content is genuinely powerful. For everyone else, it's a project that gets abandoned before it becomes useful.
Duolingo Max
Duolingo released a premium tier called Max that includes two AI features: Roleplay, for practicing conversations with AI characters, and Explain My Answer, which gives feedback on why a specific answer was wrong. These are real improvements over the base app. The conversation practice in particular is something earlier Duolingo couldn't do.
The underlying course structure hasn't changed, though. You're still following Duolingo's fixed path, earning XP, maintaining a streak. The AI features sit on top of the gamification rather than replacing it. Duolingo Max costs around $30/month, which is steep for what amounts to two added features on a gamified course.
MindCards
MindCards takes a different angle: instead of giving you a course, it lets you generate your own flashcard decks from photos, prompts, or text, and then handles the spaced repetition automatically. You could photograph a restaurant menu in Spanish, tell the app to generate vocabulary cards from it, and start reviewing those words the same day -- reviewed at the right intervals, based on your actual performance on each card.
The core argument for this approach is that intermediate learners' gaps are specific to them. Someone who learned Spanish through a telenovela has different holes than someone who learned through a textbook. Pre-made decks can't account for that. Content you generate from your own sources can.
The AI study assistant inside MindCards can also answer questions during review sessions -- if you're confused about why a word is used one way and not another, you can ask without leaving the app. That's a small thing that turns out to matter quite a bit during actual study sessions.
One feature that's easy to overlook: MindCards can generate audio for your flashcards. If you're not sure how a word is pronounced, you can listen to it directly during review without switching to a dictionary or pronunciation app. For language learners who want to get speaking and listening right alongside reading, that's genuinely useful to have built in.
The free tier includes AI card generation and 5 AI credits per month, with no account required. Premium adds unlimited credits and iCloud sync across devices. It runs on iOS, supports 11 languages (Spanish, French, German, Dutch, Japanese, Korean, Arabic, Hindi, Portuguese, Russian, Italian), and doesn't require creating an account to start.
What the research says about personalized content
A 2021 paper from the Language Learning journal found that vocabulary instruction tailored to individual learners' gaps produced significantly better retention than instruction built around frequency lists alone. The mechanism is straightforward: when a word is genuinely new and relevant to you, you process it more deeply than when it's new but abstract.
This is why generating cards from content you actually care about -- a book you're reading, a show you're watching, a topic you're researching -- tends to beat working through a generic deck. The word lands in a context you've already engaged with. There's something to attach it to.
Pre-made frequency lists aren't useless, especially at A1 and A2. But past a certain point, the highest-leverage vocabulary work is the gap-filling kind: the words that keep coming up in your specific input that you keep not knowing. An AI app that can generate content around those gaps, and then schedule it intelligently, is genuinely different from one that serves you the same course it serves everyone else.
How to choose
The best app depends on where you are and what your bottleneck actually is.
If you're a complete beginner: Pimsleur's audio-first method will build a solid foundation faster than flashcards alone. Duolingo also works fine for the first few months -- the gamification that gets annoying later is genuinely useful when you're just trying to build a habit.
If speaking is your specific gap and you've built vocabulary you can't use in conversation: Speak is the most focused tool for that.
If you're at an intermediate level and your vocabulary growth has stalled: MindCards is the pick. You generate cards from content you're already using -- a show you're watching, an article you're reading, a menu you photographed -- and the app schedules your reviews based on what you actually struggle with. Audio playback is built in so you can hear the correct pronunciation during review without switching apps. Pair it with active recall during study sessions and the gap between "words I've seen" and "words I actually know" closes faster than any pre-made course will close it.
MindCards is free to download. No account required to get started.
