bitbaum Start a project
Product

Heidi

Zürich German, for learners

Heidi — screenshot of heidi.orangecat.ch

Understand what was said, then write back in it. Sign in, practise in a group, and Heidi answers in the conversation when you name her.

StageBeta — running, not released
FieldKnowledge, AI agents
SinceSep 2026
Addressheidi.orangecat.ch
Sourcebitbaum/heidi
ProfilesOrangeCat
The problem

An adult who already commands German still cannot understand the Zurich German spoken around them, and the environment withdraws exposure exactly when it detects they need it: the Swiss switch to Hochdeutsch or English the moment they notice you struggling. The learner is denied the input because they are a learner. That trap is the reason a product is justified at all.

What it does

A source of exposure that does not withdraw. Raw exposure is not input, so the job is calibrated exposure at the learner's frontier, measured per learner and continuously — the thing software can do that a podcast cannot. Real recorded speakers, plus a deterministic variety gate, because a learner buying Zurich German cannot audit whether they were handed Bernese forms.

Where it is heading

Progress measured by how much of an unfamiliar Zurich speaker the learner understands — not by how much Heidi they have consumed.

Being built now
  • A Zurich lexicon against invented facts
  • Have a say through Solon
  • The same for French
  • The listening lab
  • More dialects

Ask about Heidi

Ask anything about Heidi — the Cat and Loki answer right away from the project catalogue. Want a person instead? Send them the conversation.

The chat needs JavaScript. Browse every project or join the waitlist.