Terms of Service

Effective: May 20, 2026

These Terms of Service ("Terms") govern your access to and use of Itzli ("Itzli," "the app," "we," "us"), a free educational web application for learning Eastern Huasteca Nahuatl. By creating an account or using Itzli, you agree to these Terms. If you do not agree, do not use the app.

1. Who may use Itzli

Itzli is available to users aged 13 and older. If you are under 18, you represent that you have a parent or legal guardian's permission to use the app. Itzli is not directed at children under 13, and we do not knowingly collect personal information from children under 13.

2. Accounts

Authentication is provided by Clerk. You are responsible for maintaining the security of your account credentials and for all activity under your account. Notify us promptly at svillasmith3@gmail.com if you suspect unauthorized access.

3. Acceptable use

You agree not to:

We may refuse service, block accounts, or remove content that violates these rules.

4. The AI tutor — important disclaimer

Itzli's tutor feature (Tlamachtihquetl) uses a third-party large language model (OpenAI) to generate Nahuatl grammar explanations and conversation practice. AI output may be inaccurate, incomplete, or fabricated, particularly for a minority language with limited training data. Do not rely on the tutor for academic, legal, medical, financial, or safety-critical purposes. The tutor is not a substitute for a native speaker, certified instructor, or professional translator.

Your messages to the tutor are transmitted to OpenAI for processing under their own terms. You agree not to submit personal, confidential, or sensitive information to the tutor.

We do not store raw tutor chat text in our database. We may store privacy-preserving audit metadata, including one-way hashes of chat content and structured safety/control information, to operate guardrails, investigate abuse, and verify that moderation controls ran.

5. Content accuracy and audio

Vocabulary and grammar content has been audited against IDIEZ and other scholarly references, but some entries contain known limitations noted in the curriculum. Audio pronunciations are machine-synthesizedusing language-specific machine synthesis where available. Treat generated audio as educational support rather than a substitute for a trained instructor or community speaker.

6. Intellectual property

The Itzli source code is released under the project's open-source license available in the repository. Imported Nāhuatlahtolli lesson content is adapted from the COERLL course by Sabina de la Cruz, Catalina de la Cruz, Josefrayn Sánchez-Perry, Kelly McDonough, and Sergio Romero and remains available under CC BY-SA 4.0. Itzli additions, machine-generated audio, photographs, and other third-party assets are licensed from their respective owners or under the notices shown in the app and repository. Account sign-in for the hosted app does not remove the Creative Commons rights attached to the imported Nāhuatlahtolli material.

You retain rights to content you submit, but by submitting content to the tutor you grant us a non-exclusive right to process it (including via OpenAI) for the purpose of delivering your requested response and enforcing safety policies.

7. Third-party services

Itzli relies on the following third-party services:

Your use of Itzli is also subject to the terms and privacy practices of these providers.

8. Termination

You may stop using Itzli and delete your account at any time. We may suspend or terminate access if you violate these Terms or if we discontinue the service. Upon termination, your right to use the app ceases; the disclaimers and liability provisions below survive.

9. Disclaimer of warranties

Itzli is provided "as is" and "as available" without warranties of any kind, express or implied, including without limitation warranties of merchantability, fitness for a particular purpose, non-infringement, or accuracy of content. We do not warrant that the app will be uninterrupted, error-free, or free from harmful components.

10. Limitation of liability

To the maximum extent permitted by law, in no event will Itzli or its author be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or for any loss of profits, data, use, or goodwill, arising out of or related to your use of the app. Our total aggregate liability under these Terms will not exceed one hundred US dollars (USD 100.00) or the amount you have paid us in the past twelve months, whichever is greater.

11. Indemnification

You agree to indemnify and hold harmless Itzli and its author from any claim, loss, or expense (including reasonable attorneys' fees) arising from your breach of these Terms or your misuse of the app.

12. Changes to these Terms

We may update these Terms as the app evolves. Material changes will be indicated by bumping the effective date above; continued use after such changes constitutes acceptance. You may be asked to re-accept updated Terms via a modal on first use after an update.

13. Governing law

These Terms are governed by the laws of the State of Texas, United States, without regard to conflict-of-law principles. Disputes will be resolved exclusively in the state or federal courts located in Texas, and you consent to the personal jurisdiction of those courts.

14. Contact

Questions about these Terms? Email svillasmith3@gmail.com.

See also our Privacy Policy and EULA.