NexoAuthored in Git
Typed lesson files keep grammar explanations reviewable and versioned.
Free forever · Open source
Spanish belongs to everyone.
Nexo is building one complete, structured grammar course that anyone can learn from, inspect, improve, translate, or adapt.
For learners
The whole course. $0.
Start Here needs no account. A free account after that keeps your place, preserves first attempts, and carries mastery evidence and review history across the complete path.
Start learningFor contributors
Ready to be public.
The application code is licensed under MIT. Nexo's authored curriculum and grammar content are licensed under CC BY-SA 4.0, so improvements to the learning commons stay open.
The learning contract
Free, complete, and open to everyone.
Spanish FoundationsIncludedCost
Complete 4-stage course$0
88 structured lessons$0
Listening and sentence audio$0
Interactive grammar practice$0
Concept-level progress evidence$0
Stage checkpoints and review$0
One source of truth
A course with a beginning, a path, and an end.
Free accounts
Accounts exist to preserve learning state, never to decide who can afford access.
Evidence by concept
Attempts build a durable picture of what the learner can understand and produce.
Open improvements
Corrections and additions can strengthen the same shared grammar source.
The business model will never be a tollbooth in front of Spanish grammar.
What the account is for
Keep the course in motion
Resume the exact lesson or checkpoint that logically comes next.
Preserve evidence
Keep first attempts, corrections, concept evidence, and completed lessons together.
Learn across devices
Use the same account wherever you continue the course.
The clear answers
Free, with structure.
Is every lesson free?
Yes. All four stages, sixteen modules, checkpoints, review, and future course improvements are free.
Why is an account required after Start Here?
The later course depends on ordered progress, preserved attempts, concept evidence, and review history. The account keeps that learning record coherent and available across devices.
Can I use the grammar content elsewhere?
Yes. The authored course content uses CC BY-SA 4.0, which permits sharing and adaptation with attribution under the same license.
Can I build with the code?
Yes. The application code uses the permissive MIT License.