feedback5: the Japanese game texts keep what the JP client writes like the Chinese — build-i18n's ja test is 'native' (a text identical to the Chinese is the client's own when every Han character of it appears in the client's translated texts: 炎 / 不屈 / 助力 / 速射手 stay, 甄选干员 is still untranslated), so the bonds 炎, 不屈 and 助力 no longer show their English names in a Japanese interface; data/i18n/ja.json rebuilt (97.5 %, bonds 100 %) and zh-TW.json (the UI pack's emote names); the CJK font stack follows <html lang> (Japanese kanji, Traditional Chinese, a Korean face); the lobby's difficulty lines drop the JP bullet ・ too; golden unchanged

public/css/theme.css

@@ -78,9 +78,11 @@
   --lv-6: #5d341e;
 
   /* type */
-  --font-cjk: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
-  --font-num: 'Bender', 'Rajdhani', 'Oxanium', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
-  --font-display: 'Novecento', 'Novecento Wide', 'Oxanium', 'Rajdhani', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
+  /* the Han / Hangul faces follow <html lang> (ui/lang.js htmlLang; the :lang() rules below): Simplified Chinese by default */
+  --cjk-faces: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans SC', 'Noto Sans CJK SC';
+  --font-cjk: var(--cjk-faces), sans-serif;
+  --font-num: 'Bender', 'Rajdhani', 'Oxanium', var(--cjk-faces), sans-serif;
+  --font-display: 'Novecento', 'Novecento Wide', 'Oxanium', 'Rajdhani', var(--cjk-faces), sans-serif;
   --font-mono: 'Bender', 'Oxanium', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
 
   /* motion */
@@ -105,6 +107,12 @@
   --bk-w: 2px;
 }
 
+/* Language packs (docs/I18N.md): the same characters take their own glyph forms per language — Japanese kanji,
+   Traditional Chinese, a Korean face for Hangul (each stack falls back to the Simplified Chinese faces). */
+:root:lang(ja) { --cjk-faces: 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic UI', 'Yu Gothic', 'Meiryo', 'Noto Sans CJK JP', 'Noto Sans SC', 'Microsoft YaHei'; }
+:root:lang(ko) { --cjk-faces: 'Noto Sans KR', 'Apple SD Gothic Neo', 'Malgun Gothic', 'Noto Sans CJK KR', 'Noto Sans SC', 'Microsoft YaHei'; }
+:root:lang(zh-TW) { --cjk-faces: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', 'Noto Sans CJK TC', 'Noto Sans SC', 'Microsoft YaHei'; }
+
 /* ---- root scale ----------------------------------------------------------------------------- */
 html {
   font-size: clamp(40px, min(calc(100vw / 19.2), calc(100vh / 10.8)), 240px);