feedback5 WI: docs/I18N.md (translating, adding strings, rebuilding the EN game texts, phase 2) and credits

NOTICE.md and THIRD-PARTY-NOTICES.md credit @YuriRestia (PR #70) for the English UI strings and fallback
translations, note that PR #70's ak-spa-database.pages.dev texts are not used and that arknights.wiki.gg is
CC BY-SA 4.0, and name the EN data mirrors (ArknightsAssets/ArknightsGamedata, Kengxxiao/ArknightsGameData_YoStar).
DATA.md: data/i18n/en.json is written by tools/build-i18n.mjs (rerun after a text-changing build).
PLAYING.md: the 中文 / English switch.

NOTICE.md

@@ -13,6 +13,8 @@ Copyright (C) 2026 Stronghold-Protocol contributors
 - `tools/local-extract/aklz4.py` 来自 [isHarryh/Ark-Unpacker](https://github.com/isHarryh/Ark-Unpacker)，保持 BSD-3-Clause 许可（见 `tools/local-extract/LICENSE-Ark-Unpacker.txt`）。
 - 通过 npm 安装的第三方库（PixiJS、pixi-spine、Preact、htm、three.js、ws 等）和字体各自保留原许可证，见 [THIRD-PARTY-NOTICES.md](THIRD-PARTY-NOTICES.md)。
 
+**英文翻译致谢**：界面英文文本 `public/i18n/en.json` 与游戏文本的补充译文 `tools/i18n/fallback-pr70.json` 以 GitHub PR #70（分支 `en-translation`）中 **@YuriRestia** 的翻译为基础，经项目所有者决定（2026-10-05）署名沿用，随本项目一同以 GPL-3.0-or-later 发布；PR #70 中取自 ak-spa-database.pages.dev（未声明许可）的文本未被采用。英文游戏文本 `data/i18n/en.json` 本身是官方英文服数据（见第 2 节）。
+
 **附加许可（GPL-3.0 第 7 条）** — Additional permission under GNU GPL version 3 section 7:
 
 > If you modify this Program, or any covered work, by linking or combining it with the Spine Runtimes (as shipped in
@@ -28,7 +30,7 @@ Copyright (C) 2026 Stronghold-Protocol contributors
 《明日方舟》及「卫戍协议」相关的全部**名称、角色、美术、Spine 模型、界面图、音乐音效、文本与游戏数据**，版权归上海鹰角网络科技有限公司及其授权方（Yostar 等）所有。具体包括：
 
 - Release 完整包中的 `public/assets/**`（含从官方客户端本地提取的 3D 棋盘模型与贴图 `public/assets/local/**`）和 `public/fonts/**`（字体归各自作者）；
-- 由官方数据表生成的 `data/*.json`，以及含有或派生自游戏数据的 `docs/research/*.json`、`test/fixtures/official-waves.json`、`public/dev/recordings/*.json`；
+- 由官方数据表生成的 `data/*.json` 与 `data/i18n/*.json`（官方英文服文本），以及含有或派生自游戏数据的 `docs/research/*.json`、`test/fixtures/official-waves.json`、`public/dev/recordings/*.json`；
 - `docs/img/` 中的游戏截图；
 - `docs/` 中引用的 PRTS、BWIKI、NGA、巴哈姆特等社区页面的文字（仍按其来源的许可，维基文本为 CC BY-NC-SA）。
 
@@ -64,3 +66,5 @@ art, models, audio and data — including everything under `public/assets/` in t
 Yostar and their licensors, are **not** covered by the GPL, and may be used for study and personal non-commercial
 purposes only: no selling, paid distribution, paid hosting, ads, donations or any other monetisation. Rights holders
 can request removal through a GitHub issue and the content will be taken down. No warranty of any kind.
+The English UI strings were seeded from GitHub PR #70 by @YuriRestia (credited, released with the project under
+GPL-3.0-or-later); the English game texts (`data/i18n/en.json`) are official EN client data like `data/*.json`.