Version 1 · Last updated: 1 October 2026
These Terms of Use are an agreement between you and CTO Teachings LLC, a Colorado limited liability company (“CTO Teachings”, “we”, “us”). They cover the LangLearn language-learning app for Android and iOS and the website it is built on, language.ctoteachings.com (together, “LangLearn”). How we handle your personal information is described separately in the LangLearn privacy policy.
Please read Section 17 carefully. It says that most disputes between you and us will be decided by individual arbitration rather than in court, that you give up the right to bring or join a class action, and that you give up the right to a jury trial. It also explains how you can opt out of arbitration within 30 days.
You accept these terms when you sign in to LangLearn and choose “I agree” on the terms screen. We record which version you accepted and when. If you do not agree, do not use LangLearn: choosing “Decline” signs you out, and you cannot use the app until you accept.
Each version of these terms has a number, shown at the top of this page. When we make a change that affects your rights or obligations, we raise the number, and the next time you use LangLearn you will be asked to read and accept the new version before you can continue. If you do not accept it, you may stop using LangLearn and ask us to delete your account. We may make small changes that do not affect your rights, such as fixing typing errors or broken links, without changing the version number.
You must be at least 13 years old, and at least the age at which the law where you live allows you to consent to the processing of your own personal data. In parts of the European Economic Area that age is 16. If you are under 18, you confirm that a parent or guardian has read and agreed to these terms with you.
You may not use LangLearn if the law where you live forbids it, or if we have previously closed your account for breaking these terms.
You sign in with a Google account (or, in the iOS app, with Apple). You are responsible for what happens under your account, so keep your sign-in secure, and tell us at [email protected] if you think someone else has used it. One account is for one person.
LangLearn gives you reading passages and audio pitched at your level. A passage is a story, a lesson or a conversation, with its text, its translations, and its generated audio. Passages are created in three ways: by your own AI assistant (for example Claude or ChatGPT) connected to LangLearn, by generators we run, or by us directly.
LangLearn has a shared catalogue. A passage created by one learner can be found by other learners and added to their playlists. That is what makes LangLearn useful, and it is why the next section works the way it does.
“Content” means every passage created, generated or uploaded through LangLearn, whether by you, by your AI assistant through LangLearn, or by our generators. It includes the passage’s text, its translations, its titles and word lists, the audio we generate for it, and the settings and requests used to create it.
Assignment to CTO Teachings. You assign, and agree to assign, to CTO Teachings LLC all of your right, title and interest in and to the Content, including all copyrights and other intellectual property rights in it, worldwide. This assignment takes effect when the Content is created, and for Content you created before you accepted these terms it takes effect when you accept them. This includes passages you created before you accepted these terms. To the extent the law allows, you waive, and agree not to assert against us or anyone we authorise, any moral rights or similar rights you may have in the Content.
A licence where an assignment does not work. AI-generated material may not be protected by copyright at all, and some countries do not allow certain rights to be assigned. To the extent any part of the assignment above is not effective for any reason, you grant CTO Teachings LLC a perpetual, irrevocable, worldwide, royalty-free, fully paid, transferable and sublicensable (through multiple levels) licence to use, copy, store, modify, adapt, translate, create derivative works from, publish, distribute, perform, display and otherwise exploit the Content, in any form and any media now known or later developed, for any purpose.
What you promise us. You confirm that anything you put into LangLearn yourself, such as words, names or instructions in a request, is yours to give or is something you are allowed to use, and that our use of it under these terms will not infringe anyone else’s rights.
What stays yours. Your conversations with your own AI assistant happen under that provider’s terms, and we only receive the finished passage. Your learning progress, word level and playlists are your personal data and are handled under the privacy policy.
Our app. LangLearn itself, including its software, design, word lists, course lessons, placement tests and branding, belongs to CTO Teachings or its licensors. We give you a personal, non-exclusive, non-transferable, revocable licence to use LangLearn for your own language learning, under these terms. Nothing in these terms gives you any other right in it.
Most passages in LangLearn are written by artificial intelligence, not by a person, and no person reviews each one before it appears. We do not control what an AI generates. Passages, translations, pronunciations and audio may be inaccurate, unnatural, out of date, or wrong. Some may be offensive, upsetting or otherwise objectionable to you.
We make a best effort to keep the catalogue clean, and we remove content we find or are told about that breaks these terms. But we cannot promise that every passage is accurate, suitable for you, or free of objectionable material. By using LangLearn you accept that you may encounter AI-generated content that you find objectionable, and that we are not responsible for it. Do not rely on any passage for medical, legal, financial or other professional advice, or as an authoritative translation.
You agree not to use LangLearn, or to have your AI assistant use it, to create, upload or share content that:
You also agree not to misuse LangLearn: do not try to get around its security or limits, access it through automated means other than the AI-assistant connection we provide, overload or disrupt it, copy or scrape the catalogue, reverse engineer the app except where the law expressly allows it, or use LangLearn for any commercial purpose without our written permission.
We may review, refuse, remove or change any Content at any time, for any reason, including Content that breaks these terms or that we think could harm learners or LangLearn. We are not obliged to monitor what is created. We may suspend or close your account, or limit what you can do, if we reasonably believe you have broken these terms or the law, or to protect other learners or LangLearn. Where it is appropriate and lawful, we will tell you why.
If you come across a passage that is explicit, obscene, hateful or abusive, or that contains someone’s personal information, email [email protected] with the subject line “LangLearn content report”. Tell us which passage it is (its title, its language and the link or page where you saw it) and what is wrong with it. We review every report and remove content that breaks these terms. If a passage contains your own personal information, say so, and we will remove that passage.
You can ask us to delete your account at any time by following the steps on our account deletion page. We then delete your account and your learning data as that page describes.
Because Content belongs to CTO Teachings and other learners rely on it, deleting your account does not delete the passages in the shared catalogue: they remain, no longer connected to your account, and we decide whether a particular passage stays. There are two exceptions, which we always act on:
LangLearn is free to use. The Android app shows ads from Google AdMob at breaks in listening, as described in the privacy policy. We decide where, when and how often ads appear, and we may change that, or show ads elsewhere in LangLearn, in the future.
LangLearn works with services run by other companies, including Google (sign-in and, in the Android app, ads), Apple, and the AI assistant you choose to connect, such as Claude or ChatGPT. Your use of those services is governed by their own terms and policies. We are not responsible for them, for what they do, or for their availability.
LangLearn is a young product and it changes often. We may add, change or remove features, languages, courses or Content, and we may suspend or stop offering LangLearn, in whole or in part, at any time. We are not liable to you for doing so.
LANGLEARN AND ALL CONTENT ARE PROVIDED “AS IS” AND “AS AVAILABLE”, WITHOUT WARRANTIES OF ANY KIND. TO THE FULLEST EXTENT THE LAW ALLOWS, CTO TEACHINGS DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT AND ACCURACY. WE DO NOT PROMISE THAT LANGLEARN WILL BE UNINTERRUPTED, SECURE OR ERROR-FREE, THAT ANY CONTENT WILL BE ACCURATE OR SUITABLE, OR THAT YOUR DATA OR DOWNLOADS WILL NEVER BE LOST.
TO THE FULLEST EXTENT THE LAW ALLOWS, CTO TEACHINGS AND ITS MEMBERS, MANAGERS, EMPLOYEES, CONTRACTORS AND AGENTS WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY OR PUNITIVE DAMAGES, OR FOR ANY LOSS OF PROFITS, REVENUE, DATA, GOODWILL OR OPPORTUNITY, ARISING OUT OF OR RELATING TO THESE TERMS, LANGLEARN OR ANY CONTENT, EVEN IF WE WERE TOLD THEY WERE POSSIBLE.
TO THE FULLEST EXTENT THE LAW ALLOWS, OUR TOTAL LIABILITY FOR ALL CLAIMS ARISING OUT OF OR RELATING TO THESE TERMS OR LANGLEARN IS LIMITED TO THE GREATER OF (A) THE AMOUNT YOU PAID US FOR LANGLEARN IN THE 12 MONTHS BEFORE THE EVENT GIVING RISE TO THE CLAIM, OR (B) US$100.
Some places do not allow some of these limits. Where that is the case, they apply only to the extent the law allows. Nothing in these terms limits liability that the law does not allow to be limited, such as liability for fraud, or for death or personal injury caused by negligence.
To the extent the law allows, you agree to defend, indemnify and hold harmless CTO Teachings and its members, managers, employees, contractors and agents from any claim, demand, loss, liability, damage or expense (including reasonable legal fees) brought by a third party that arises out of or relates to Content you or your AI assistant created or submitted, your use or misuse of LangLearn, or your breach of these terms or of the law.
Talk to us first. Before starting an arbitration or a lawsuit, you and we each agree to try to resolve the dispute informally. The person with the dispute must send a written notice to the other: you send yours to [email protected], and we send ours to the email address on your account. The notice must give your name and the email address on your account, describe the dispute, and say what you want. If the dispute is not resolved within 60 days after the notice is received, either of us may start an arbitration. Any time limit for bringing the claim is paused during those 60 days.
Agreement to arbitrate. You and CTO Teachings agree that any dispute, claim or controversy arising out of or relating to these terms, LangLearn or any Content, including whether it must be arbitrated, will be resolved by final and binding arbitration on an individual basis, except as described under “Exceptions” below. The arbitration will be administered by the American Arbitration Association (“AAA”) under its Consumer Arbitration Rules in effect when the arbitration starts, available at adr.org. A single arbitrator will decide the dispute. The arbitration is seated in Colorado; unless you and we agree otherwise, a hearing may take place by video or telephone, and where the AAA rules give you the right to an in-person hearing near where you live, you keep that right. Payment of filing, administration and arbitrator fees is governed by the AAA Consumer Arbitration Rules. The arbitrator may award any individual relief a court could award, but only to the individual party seeking it and only to the extent needed to resolve that party’s own claim. Judgment on the award may be entered in any court with jurisdiction. This agreement to arbitrate is governed by the U.S. Federal Arbitration Act.
No class actions. YOU AND WE EACH AGREE THAT CLAIMS MAY BE BROUGHT ONLY IN AN INDIVIDUAL CAPACITY, AND NOT AS A PLAINTIFF OR CLASS MEMBER IN ANY PURPORTED CLASS, COLLECTIVE, CONSOLIDATED OR REPRESENTATIVE PROCEEDING. The arbitrator may not consolidate more than one person’s claims or preside over any form of class, collective or representative proceeding.
No jury trial. YOU AND WE EACH GIVE UP THE RIGHT TO A TRIAL BY JURY for any dispute arising out of or relating to these terms, LangLearn or any Content, including any dispute that ends up in court.
Exceptions. Either of us may bring an individual claim in a small-claims court if it qualifies there and stays there. And CTO Teachings may go to court to protect its intellectual property, to stop misuse of LangLearn, or to seek an injunction or other urgent equitable relief, without first arbitrating.
You can opt out. You may opt out of this agreement to arbitrate by emailing [email protected] with the subject line “LangLearn arbitration opt-out” within 30 days after you first accept these terms. Include your name and the email address on your account, and state that you opt out of arbitration. Opting out does not affect any other part of these terms, and it does not affect any other arbitration agreement you have with us.
If part of this section fails. If the class-action waiver above is found unenforceable for any claim, then that claim, and only that claim, must be decided by a court as described in Section 18, and never by class arbitration; any remaining claims are still arbitrated individually, and the court case waits until the arbitration is finished. If any other part of this section is found unenforceable, the rest of it still applies.
These terms are governed by the laws of the State of Colorado, USA, without regard to its conflict-of-laws rules, except that Section 17 is governed by the Federal Arbitration Act. Any dispute that is not arbitrated, including a claim that falls under an exception or for which you have opted out, will be brought only in the state or federal courts located in Colorado, and you and we consent to the personal jurisdiction of those courts. If you live in a country whose law gives you the right to bring a claim in your own courts, or to the protection of its consumer laws, these terms do not take that right away.
To the extent the law allows, any claim arising out of or relating to these terms or LangLearn must be started within one year after the claim arises. Otherwise it is permanently barred.
These terms, together with the privacy policy and any terms shown to you inside LangLearn, are the whole agreement between you and us about LangLearn. If any part of these terms is found unenforceable, the rest stays in effect. If we do not enforce a right, we have not given it up. You may not transfer your rights under these terms; we may transfer ours, including as part of a merger, sale or reorganisation of our business. Sections 5, 6, 10 and 14 to 20 survive the end of your use of LangLearn. These terms are written in English; if we provide a translation and the two differ, the English version controls.
Questions about these terms, a content report, or a legal notice: email [email protected] or use our contact page. CTO Teachings LLC, a Colorado limited liability company.