overhaul gpx creation and usage

test/i18n.test.js

@@ -8,6 +8,26 @@ import { localizeHtml } from '../scripts/localize-html.js';
 
 const root = path.resolve(import.meta.dirname, '..');
 
+test('German legal pages and contacts remain static when the app uses English', async () => {
+  const context = { navigator: { language: 'en-GB' } };
+  const i18n = await loadI18n(context);
+  const html = await fs.readFile(path.join(root, 'public/index.html'), 'utf8');
+  const englishHtml = localizeHtml(html, key => i18n.t(key));
+  for (const name of ['privacy', 'imprint']) {
+    const pattern = new RegExp(`<article[^>]+data-info-page="${name}"[^>]*>[\\s\\S]*?</article>`);
+    const page = pattern.exec(html)?.[0];
+    assert.ok(page, name);
+    assert.match(page, /lang="de"/);
+    assert.doesNotMatch(page, /data-i18n/);
+    assert.equal(pattern.exec(englishHtml)?.[0], page);
+  }
+  for (const catalog of context.Wegwichtel.TextCatalogs.values()) {
+    for (const key of ['privacy', 'imprint', 'contacts']) {
+      assert.equal(Object.hasOwn(catalog, key), false, key);
+    }
+  }
+});
+
 test('checked-in HTML has synchronized German defaults and accessible headings, labels and links before scripts load', async () => {
   const i18n = await loadI18n({});
   const html = await fs.readFile(path.join(root, 'public/index.html'), 'utf8');