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Licenses & Attribution

Everything LingoKeep ships that someone else wrote, and the terms it travels under.
# Third-party notices

LingoKeep ships other people's work in three places — the Chrome extension's
zip, the JavaScript `lingokeep.com` sends to a visitor's browser, and the
dictionary definitions the API returns. This file is the **single source of
truth** for what that work is and under which licence it travels; the extension
build copies this exact file into every production artifact
(`apps/extension/scripts/copy-notices.mjs`), and `/licenses` on the site renders
it verbatim.

Nothing here is optional politeness. Every licence involved — MIT, ISC, Apache
2.0, the SIL Open Font License and CC BY-SA 4.0 — makes passing the notice on a
*condition* of redistribution, and this repo distributes to three audiences at
once: a store zip, a public website, and an API that hands out dictionary text.
§6 carries the licence texts that aren't quoted inline.

The test for inclusion is **"do these bytes leave our machines"**, not "is there
a zip". §5 lists what that test deliberately excludes.

---

## 1. Dictionary data

This is the largest body of other people's work in the product, and the only
part of it a user reads directly. Every gloss `/api/dict/lookup` returns, every
definition on a saved card, and every entry in a video's word list comes from
one of the three sources below. A card is a **snapshot** of that text, so it
travels onward again — into the user's deck, their Anki export, and their own
device. All three sources are share-alike; all three require attribution.

The ingestion scripts and the exact download URLs live in
`apps/home/scripts/ingest/README.md`. None of the source data is committed to
this repo.

### 1.1 Japanese — JMdict

**Creative Commons Attribution-ShareAlike 4.0** ·
<https://www.edrdg.org/wiki/index.php/JMdict-EDICT_Dictionary_Project> · licence
statement at <https://www.edrdg.org/edrdg/licence.html>

Japanese headwords, readings, kanji/kana form variants, part-of-speech tags,
English glosses and the `freq_rank` ordering all come from **JMdict**, property
of the **Electronic Dictionary Research and Development Group (EDRDG)**, and are
used in conformance with the Group's licence. Loaded by
`apps/home/scripts/ingest/jmdict.mjs`.

Japanese is the one language whose frequency ranking is *not* corpus-derived:
it comes from JMdict's own `ke_pri`/`re_pri` priority tags, so §1.3 does not
apply to it.

EDRDG asks that the acknowledgement be visible to users of a service built on
the files, not buried in a repository — which is why `/licenses` is a public
page and this section is first.

### 1.2 Spanish, French, German — Wiktionary via kaikki.org

**Creative Commons Attribution-ShareAlike 4.0** (English Wiktionary is
dual-licensed CC BY-SA 4.0 / GFDL) · <https://kaikki.org> ·
<https://en.wiktionary.org>

Entries, senses, glosses and inflected forms for the three whitespace-delimited
languages are extracted from **English Wiktionary** by **Tatu Ylonen's
wiktextract**, published as machine-readable JSONL at kaikki.org, and loaded by
`apps/home/scripts/ingest/kaikki.mjs`. The text is Wiktionary's contributors';
the extraction is Ylonen's.

> Ylonen, Tatu. *Wiktextract: Wiktionary as Machine-Readable Structured Data.*
> Proceedings of the 13th Conference on Language Resources and Evaluation
> (LREC), 2022.

### 1.3 Frequency ranking — FrequencyWords

**Creative Commons Attribution-ShareAlike 4.0** ·
<https://github.com/hermitdave/FrequencyWords>

The `freq_rank` column for Spanish, French and German is Hermit Dave's
**FrequencyWords** 50k lists, derived from the OpenSubtitles corpus, loaded by
`apps/home/scripts/ingest/freq.mjs`. It does more than order results: `MINE_LEVELS`
reads this number to decide which words a learner is assumed to already know, so
it shapes what the word list shows.

Japanese ranks come from JMdict instead (§1.1) — `freq.mjs` refuses any language
declaring a segmenter.

### 1.4 Japanese segmentation — kuromoji

**Apache License 2.0** (full text in §6.3) ·
<https://github.com/takuyaa/kuromoji.js> · IPADIC dictionary: see its own terms

`kuromoji` tokenizes Japanese subtitle lines so a click can land on a word. It
runs **server-side only** and its dictionary ships inside a private container
image, so no kuromoji bytes reach a user. It is listed here because its output —
the token boundaries and readings — is what the dictionary lookup is keyed on,
and because naming it costs nothing.

---

## 2. Fonts

**SIL Open Font License 1.1** (full text in §6.4) · <https://fonts.google.com>

Three families set the entire product, and **both** surfaces serve the binaries
from our own origin rather than linking Google's CDN — so both redistribute
them and owe the notice here:

- the **extension** bundles five subsetted `woff2` files in
  `apps/extension/assets/fonts/`, which Plasmo compiles into the zip;
- the **site** loads them through Next's `next/font/google`, which downloads the
  files **at build time** and serves them from `lingokeep.com`.

| Family | Role | Copyright |
|---|---|---|
| Literata (upright + true italic) | the target language, page titles, the wordmark | Copyright 2017 The Literata Project Authors (<https://github.com/googlefonts/literata>) |
| IBM Plex Sans | all interface chrome | Copyright © 2017 IBM Corp. with Reserved Font Name "Plex" |
| IBM Plex Mono | every figure and timecode | Copyright © 2017 IBM Corp. with Reserved Font Name "Plex" |

Why these three and what each is allowed to set is a product rule, not a
licensing one: `packages/core/src/ui/type.js` and apps/home/README.md §排版.

---

## 3. Icons — Lucide

**ISC**, with the Feather-derived subset under **MIT** (both texts in §6.2) ·
<https://lucide.dev>

Both surfaces draw the same glyphs, by two different routes:

- **the site** imports the `lucide-react` package;
- **the extension** ships lucide's own 24×24 node lists copied into
  `apps/extension/src/components/icon-nodes.jsx`, because the content script
  cannot afford the package. Copied source is still redistribution, and the
  header of that file names its origin and version.

Copyright (c) 2026 Lucide Icons and Contributors. The icons listed inside §6.2
are derived from Feather, Copyright (c) 2013-present Cole Bemis.

---

## 4. Runtime dependencies we redistribute

Two bundles reach other people's machines — the extension zip, and the
JavaScript the site sends to a visitor's browser — so both are redistribution
and both belong here.

### 4.1 Compiled into the extension zip

Everything in `apps/extension`'s `dependencies` is compiled into the package
uploaded to the Chrome Web Store. All **MIT** except where marked; the MIT text
is in §6.1 and only the copyright lines differ.

| Package | Licence | Copyright |
|---|---|---|
| `react`, `react-dom` | MIT | Copyright (c) Meta Platforms, Inc. and affiliates. |
| `@mui/material`, `@mui/icons-material` | MIT | Copyright (c) 2014 Call-Em-All |
| `@emotion/react`, `@emotion/styled`, `@emotion/is-prop-valid` | MIT | Copyright (c) Emotion team and other contributors |
| `jotai` | MIT | Copyright (c) 2020 Poimandres |
| `plasmo`, `@plasmohq/messaging` | MIT | Copyright (c) 2023 Plasmo Corp. \<foss@plasmo.com\> (<https://www.plasmo.com>) and contributors |
| `ts-fsrs` | MIT | Copyright (c) 2026 Open Spaced Repetition |
| `dexie`, `dexie-react-hooks` | **Apache-2.0** (§6.3) | Copyright (c) 2014-2017 David Fahlander |

`@jun/lingokeep-core` is this repo's own workspace package and carries no
third-party obligation of its own.

Dexie ships a `NOTICE` file, and Apache-2.0 §4(d) makes carrying it forward a
condition rather than a courtesy — it is reproduced here in full:

```
Dexie.js

Copyright (c) 2014-2017 David Fahlander

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
```

### 4.2 Compiled into the site's browser bundle

`lingokeep.com` renders on the server, but its interactive parts are React
components, so Next ships their libraries to every visitor. Three of these are
**not** MIT — `lucide-react` and `next-auth` are ISC, `class-variance-authority`
is Apache 2.0 — and §6 carries those texts for that reason.

| Package | Licence | Copyright |
|---|---|---|
| `next` | MIT | Copyright (c) 2025 Vercel, Inc. |
| `react`, `react-dom` | MIT | Copyright (c) Meta Platforms, Inc. and affiliates. |
| `@radix-ui/react-*` (accordion, avatar, dialog, dropdown-menu, label, radio-group, scroll-area, separator, slot, tabs, tooltip) | MIT | Copyright (c) 2022 WorkOS |
| `lucide-react` | **ISC** (§6.2; the Feather-derived icons: MIT) | Copyright (c) 2026 Lucide Icons and Contributors · Feather: Copyright (c) 2013-present Cole Bemis |
| `next-auth` | **ISC** (§6.2) | Copyright (c) 2022-2024, Balázs Orbán |
| `class-variance-authority` | **Apache-2.0** (§6.3) | Joe Bell (<https://joebell.co.uk>) |
| `clsx` | MIT | Copyright (c) Luke Edwards \<luke.edwards05@gmail.com\> (lukeed.com) |
| `tailwind-merge` | MIT | Copyright (c) 2021 Dany Castillo |
| `tailwindcss`, `tw-animate-css` | MIT | Copyright (c) Tailwind Labs, Inc. · Copyright (c) 2025 Wombosvideo |
| `sonner` | MIT | Copyright (c) 2023 Emil Kowalski |
| `next-themes` | MIT | Copyright (c) 2022 Paco Coursey |
| `zod` | MIT | Copyright (c) 2025 Colin McDonnell |
| `ts-fsrs` | MIT | Copyright (c) 2026 Open Spaced Repetition |
| `react-scroll` | MIT | Copyright (c) 2015-present Joachim Karlsson (fisshy) |
| `yet-another-react-lightbox` | MIT | Copyright (c) 2022 Igor Danchenko |
| `date-fns` | MIT | Copyright (c) 2021 Sasha Koss and Lesha Koss (<https://kossnocorp.mit-license.org>) |
| `jotai` | MIT | Copyright (c) 2020 Poimandres |
| `@tanstack/react-query`, `@tanstack/react-table` | MIT | Copyright (c) 2021-present Tanner Linsley · Copyright (c) 2016 Tanner Linsley |
| `react-hook-form`, `@hookform/resolvers` | MIT | Copyright (c) 2019-present Beier(Bill) Luo |

`ts-fsrs` is here as well as in §4.1 because the review schedule is computed in
the browser on **both** surfaces. The TanStack / react-hook-form / jotai /
date-fns group arrives through `@jun/site-kit`'s account and admin surfaces
rather than through this repo's own imports; it ships to the browser all the
same, which is the only test that matters here.

---

## 5. What is deliberately not here

Server-side use is not distribution, so packages that never leave our machines
carry no notice obligation. Named here so that the *absence* is a decision
rather than an oversight:

- **`next-mdx-remote` (MPL-2.0)** — imported only as `next-mdx-remote/rsc`, which
  compiles blog MDX during the server render. If it ever moves to a client
  component, MPL-2.0's source-availability condition applies and it belongs in
  §4.2.
- **`@vercel/speed-insights` (Apache-2.0)** — rendered only when `process.env.VERCEL`
  is set, and this app deploys to our own Kubernetes cluster. It ships to nobody.
- `drizzle-orm`, `postgres`, `stripe`, `pino`, `@anthropic-ai/sdk` and the rest of
  the server-only tree, which exist solely inside a private container image.
- `kuromoji` is the one exception listed anyway, in §1.4, because its output is
  user-facing.

Video material used in product screenshots is a separate obligation with its own
public page: **`/credits`** (CC BY 3.0, attribution per video). It is not merged
into this file because the two have different lifecycles — that list changes when
a screenshot is retaken.

YouTube is a trademark of Google LLC. LingoKeep is not affiliated with,
endorsed by, or sponsored by YouTube or Google. The extension renders subtitles
in the user's own browser and never modifies YouTube's servers or content; video
content seen through it belongs to its creators.

---

## 6. Full licence texts referenced above

CC BY-SA 4.0 (§1) is not reproduced here: that licence's own condition is
satisfied by a URI, and the text is 20× the size of everything else on this page.
It is at <https://creativecommons.org/licenses/by-sa/4.0/legalcode>.

### 6.1 MIT License

The text below is the standard MIT licence, reproduced once. The copyright line
of each MIT package is in its row of §4; substitute it for the placeholder line.

```
MIT License

Copyright (c) <the copyright holder named in §4>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
```

### 6.2 ISC License — `lucide-react`, `next-auth`

The file below is `lucide-react/LICENSE` as published: the ISC grant, then the
MIT grant covering the subset of icons derived from the Feather project.
`next-auth` carries the same ISC grant under a different copyright line
(Copyright (c) 2022-2024, Balázs Orbán).

```
ISC License

Copyright (c) 2026 Lucide Icons and Contributors

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

---

The following Lucide icons are derived from the Feather project:

airplay, alert-circle, alert-octagon, alert-triangle, aperture, arrow-down-circle, arrow-down-left, arrow-down-right, arrow-down, arrow-left-circle, arrow-left, arrow-right-circle, arrow-right, arrow-up-circle, arrow-up-left, arrow-up-right, arrow-up, at-sign, calendar, cast, check, chevron-down, chevron-left, chevron-right, chevron-up, chevrons-down, chevrons-left, chevrons-right, chevrons-up, circle, clipboard, clock, code, columns, command, compass, corner-down-left, corner-down-right, corner-left-down, corner-left-up, corner-right-down, corner-right-up, corner-up-left, corner-up-right, crosshair, database, divide-circle, divide-square, dollar-sign, download, external-link, feather, frown, hash, headphones, help-circle, info, italic, key, layout, life-buoy, link-2, link, loader, lock, log-in, log-out, maximize, meh, minimize, minimize-2, minus-circle, minus-square, minus, monitor, moon, more-horizontal, more-vertical, move, music, navigation-2, navigation, octagon, pause-circle, percent, plus-circle, plus-square, plus, power, radio, rss, search, server, share, shopping-bag, sidebar, smartphone, smile, square, table-2, tablet, target, terminal, trash-2, trash, triangle, tv, type, upload, x-circle, x-octagon, x-square, x, zoom-in, zoom-out

The MIT License (MIT) (for the icons listed above)

Copyright (c) 2013-present Cole Bemis

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
```

### 6.3 Apache License 2.0 — `dexie`, `dexie-react-hooks`, `class-variance-authority`, `kuromoji`

The text below is `dexie/LICENSE` as published. `class-variance-authority` is
Apache-2.0 by Joe Bell, `kuromoji` by Takuya Asano; the licence text is the same
for all of them.

```
Apache License
                           Version 2.0, January 2004
                        http://www.apache.org/licenses/

   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

   1. Definitions.

      "License" shall mean the terms and conditions for use, reproduction,
      and distribution as defined by Sections 1 through 9 of this document.

      "Licensor" shall mean the copyright owner or entity authorized by
      the copyright owner that is granting the License.

      "Legal Entity" shall mean the union of the acting entity and all
      other entities that control, are controlled by, or are under common
      control with that entity. For the purposes of this definition,
      "control" means (i) the power, direct or indirect, to cause the
      direction or management of such entity, whether by contract or
      otherwise, or (ii) ownership of fifty percent (50%) or more of the
      outstanding shares, or (iii) beneficial ownership of such entity.

      "You" (or "Your") shall mean an individual or Legal Entity
      exercising permissions granted by this License.

      "Source" form shall mean the preferred form for making modifications,
      including but not limited to software source code, documentation
      source, and configuration files.

      "Object" form shall mean any form resulting from mechanical
      transformation or translation of a Source form, including but
      not limited to compiled object code, generated documentation,
      and conversions to other media types.

      "Work" shall mean the work of authorship, whether in Source or
      Object form, made available under the License, as indicated by a
      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object
      form, that is based on (or derived from) the Work and for which the
      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes
      of this License, Derivative Works shall not include works that remain
      separable from, or merely link (or bind by name) to the interfaces of,
      the Work and Derivative Works thereof.

      "Contribution" shall mean any work of authorship, including
      the original version of the Work and any modifications or additions
      to that Work or Derivative Works thereof, that is intentionally
      submitted to Licensor for inclusion in the Work by the copyright owner
      or by an individual or Legal Entity authorized to submit on behalf of
      the copyright owner. For the purposes of this definition, "submitted"
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      to the Licensor or its representatives, including but not limited to
      communication on electronic mailing lists, source code control systems,
      and issue tracking systems that are managed by, or on behalf of, the
      Licensor for the purpose of discussing and improving the Work, but
      excluding communication that is conspicuously marked or otherwise
      designated in writing by the copyright owner as "Not a Contribution."

      "Contributor" shall mean Licensor and any individual or Legal Entity
      on behalf of whom a Contribution has been received by Licensor and
      subsequently incorporated within the Work.

   2. Grant of Copyright License. Subject to the terms and conditions of
      this License, each Contributor hereby grants to You a perpetual,
      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
      copyright license to reproduce, prepare Derivative Works of,
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   3. Grant of Patent License. Subject to the terms and conditions of
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      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
      (except as stated in this section) patent license to make, have made,
      use, offer to sell, sell, import, and otherwise transfer the Work,
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      by such Contributor that are necessarily infringed by their
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      as of the date such litigation is filed.

   4. Redistribution. You may reproduce and distribute copies of the
      Work or Derivative Works thereof in any medium, with or without
      modifications, and in Source or Object form, provided that You
      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and
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      (d) If the Work includes a "NOTICE" text file as part of its
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          within a display generated by the Derivative Works, if and
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      You may add Your own copyright statement to Your modifications and
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      the conditions stated in this License.

   5. Submission of Contributions. Unless You explicitly state otherwise,
      any Contribution intentionally submitted for inclusion in the Work
      by You to the Licensor shall be under the terms and conditions of
      this License, without any additional terms or conditions.
      Notwithstanding the above, nothing herein shall supersede or modify
      the terms of any separate license agreement you may have executed
      with Licensor regarding such Contributions.

   6. Trademarks. This License does not grant permission to use the trade
      names, trademarks, service marks, or product names of the Licensor,
      except as required for reasonable and customary use in describing the
      origin of the Work and reproducing the content of the NOTICE file.

   7. Disclaimer of Warranty. Unless required by applicable law or
      agreed to in writing, Licensor provides the Work (and each
      Contributor provides its Contributions) on an "AS IS" BASIS,
      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
      PARTICULAR PURPOSE. You are solely responsible for determining the
      appropriateness of using or redistributing the Work and assume any
      risks associated with Your exercise of permissions under this License.

   8. Limitation of Liability. In no event and under no legal theory,
      whether in tort (including negligence), contract, or otherwise,
      unless required by applicable law (such as deliberate and grossly
      negligent acts) or agreed to in writing, shall any Contributor be
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      Work (including but not limited to damages for loss of goodwill,
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      other commercial damages or losses), even if such Contributor
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   9. Accepting Warranty or Additional Liability. While redistributing
      the Work or Derivative Works thereof, You may choose to offer,
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      on Your own behalf and on Your sole responsibility, not on behalf
      of any other Contributor, and only if You agree to indemnify,
      defend, and hold each Contributor harmless for any liability
      incurred by, or claims asserted against, such Contributor by reason
      of your accepting any such warranty or additional liability.

   END OF TERMS AND CONDITIONS

   APPENDIX: How to apply the Apache License to your work.

      To apply the Apache License to your work, attach the following
      boilerplate notice, with the fields enclosed by brackets "{}"
      replaced with your own identifying information. (Don't include
      the brackets!)  The text should be enclosed in the appropriate
      comment syntax for the file format. We also recommend that a
      file or class name and description of purpose be included on the
      same "printed page" as the copyright notice for easier
      identification within third-party archives.

   Copyright {yyyy} {name of copyright owner}

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

```

### 6.4 SIL Open Font License 1.1 — Literata, IBM Plex Sans, IBM Plex Mono

The copyright line each family reserves is in §2.

```
Copyright 2017 The Literata Project Authors (https://github.com/googlefonts/literata)

This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL


-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------

PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font creation
efforts of academic and linguistic communities, and to provide a free and
open framework in which fonts may be shared and improved in partnership
with others.

The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded, 
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply
to any document created using the fonts or their derivatives.

DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.

"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).

"Original Version" refers to the collection of Font Software components as
distributed by the Copyright Holder(s).

"Modified Version" refers to any derivative made by adding to, deleting,
or substituting -- in part or in whole -- any of the components of the
Original Version, by changing formats or by porting the Font Software to a
new environment.

"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.

PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed, modify,
redistribute, and sell modified and unmodified copies of the Font
Software, subject to the following conditions:

1) Neither the Font Software nor any of its individual components,
in Original or Modified Versions, may be sold by itself.

2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.

3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the corresponding
Copyright Holder. This restriction only applies to the primary font name as
presented to the users.

4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
Software shall not be used to promote, endorse or advertise any
Modified Version, except to acknowledge the contribution(s) of the
Copyright Holder(s) and the Author(s) or with their explicit written
permission.

5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
distributed under any other license. The requirement for fonts to
remain under this license does not apply to any document created
using the Font Software.

TERMINATION
This license becomes null and void if any of the above conditions are
not met.

DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
OTHER DEALINGS IN THE FONT SOFTWARE.
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