Build vocabulary faster through adaptive AI conversation.
Early access to Nizdos begins with an AI Tutor designed for learners from A2 to advanced proficiency. Set it to your level and use it for real questions and conversation. As you chat, the Vocabulary Engine builds a picture of what you know. It uses that picture to reinforce words when they need attention and introduce useful new vocabulary in context.
Additional languages and a library of classic books with selected audiobook editions are in development. Founder’s Circle members will help shape which languages, books, and learning surfaces come first.
What Founder’s Circle members get first
Early access starts with the conversational core: an adaptive AI Tutor, the Vocabulary Engine, and optional focused review for the vocabulary you are actually meeting.
AI Tutor
Use Nizdos as your everyday AI chat in the language you’re learning: questions, planning, drafting, explanations, recommendations, and conversation practice. The Tutor brings back words you’re learning at useful moments, so reinforcement happens inside real conversation.
Early accessLevel adjustment
Set the Tutor from A2 through advanced proficiency, so conversation stays tuned to your level.
Early accessNizdos Vocabulary Engine
Words you meet in conversation contribute to the same picture of what you know, so vocabulary can return when it is useful.
Early accessOptional review
Vocabulary review already happens as you chat with the AI Tutor. If you want extra focused review, flashcards are integrated with the same Vocabulary Engine.
Early accessIn development: the classics library
These are the first French and Spanish works planned for the library, where we’ll initially focus on literature and philosophy from the 16th to the early 20th century. The reading experience will connect to the same Vocabulary Engine, so words you meet in books can shape review and Tutor conversation too.
Where Nizdos is headed
These are future directions. Founder’s Circle member feedback will help shape the order and details.
Additional languages
Additional language experiences, with early notice to the people waiting for them.
In developmentClassic books and audio
A curated reading library with selected audiobook editions where audio coverage is available.
In developmentMore curated content
More ways to read, listen, and learn beyond the initial classic-book library.
FutureYour own texts
Future tools will let you bring your own texts into Nizdos so they can connect to your Vocabulary Engine.
FutureCommon questions
Is payment required now?
No. Joining the waitlist does not require payment or commitment. First Founder’s Circle invitations begin in spring 2027. If you receive an invitation, you’re under no obligation to join. If you decide not to, the spot will be offered to someone else on the list.
What languages does Nizdos support?
Founder’s Circle early access will begin with French and Spanish. Other languages will be prioritized partly based on what Founder’s Circle members most want next. Future library support for new languages will also depend on book and audio availability.
What about books and audiobooks?
The first Founder’s Circle experience starts with the AI Tutor, Vocabulary Engine, and optional flashcard review. The reading library and selected audiobook editions are in development, beginning with the first shelf shown above.
I already use flashcards and/or AI chat. Why use Nizdos?
Most tools treat chat as a separate place to practice. In Nizdos, Tutor conversation is connected to the Vocabulary Engine: it introduces useful new words through real exchange, and it can bring vocabulary back into view when another encounter would help it stick.
I’m a complete beginner in my target language. Is Nizdos for me?
Potentially, but Nizdos is currently designed for A2 learners and above—people who can already spend some time engaging with the language. A highly motivated absolute beginner or A1 learner may still find it useful, but should expect a steeper start. More beginner-friendly support is planned after the first release; sign up now if you would like to follow its development.
Does Nizdos have flashcards?
Yes. Flashcards are optional, but they are not an afterthought: they are fully integrated with the Nizdos Vocabulary Engine, so focused review draws on and informs the same picture of what you know as Tutor conversation and future reading/listening surfaces.
What does “Nizdos” mean?
The name “Nizdos” is based on the prehistoric Proto-Indo-European word “nisdós” meaning “nest”. In fact, over thousands of years, “nisdós” evolved into the English word “nest”, along with “nīdus” in Latin (then “nido” in Spanish), “hnízdo” in Czech, and “nīḍá” (नी॒ड) in Sanskrit, to name a few examples, all retaining the meaning of “nest”. Nizdos is your nest of language acquisition, where your abilities develop and grow.