diff --git a/app/src/lib/nostr/translations.test.ts b/app/src/lib/nostr/translations.test.ts
new file mode 100644
index 0000000..df82317
--- /dev/null
+++ b/app/src/lib/nostr/translations.test.ts
@@ -0,0 +1,51 @@
+import { describe, it, expect } from 'vitest';
+import { parseTranslationRefs } from './translations';
+import type { NostrEvent } from './loaders';
+
+function ev(tags: string[][]): NostrEvent {
+  return {
+    id: 'x',
+    pubkey: 'p',
+    created_at: 0,
+    kind: 30023,
+    tags,
+    content: '',
+    sig: 's'
+  } as unknown as NostrEvent;
+}
+
+describe('parseTranslationRefs', () => {
+  it('extrahiert a-tags mit marker "translation"', () => {
+    const e = ev([
+      ['d', 'x'],
+      ['a', '30023:abc:other-slug', '', 'translation'],
+      ['a', '30023:abc:third-slug', '', 'translation']
+    ]);
+    expect(parseTranslationRefs(e)).toEqual([
+      { kind: 30023, pubkey: 'abc', dtag: 'other-slug' },
+      { kind: 30023, pubkey: 'abc', dtag: 'third-slug' }
+    ]);
+  });
+
+  it('ignoriert a-tags ohne marker "translation"', () => {
+    const e = ev([
+      ['a', '30023:abc:root-thread', '', 'root'],
+      ['a', '30023:abc:x', '', 'reply']
+    ]);
+    expect(parseTranslationRefs(e)).toEqual([]);
+  });
+
+  it('ignoriert a-tags mit malformed coordinate', () => {
+    const e = ev([
+      ['a', 'not-a-coord', '', 'translation'],
+      ['a', '30023:abc:ok', '', 'translation']
+    ]);
+    expect(parseTranslationRefs(e)).toEqual([
+      { kind: 30023, pubkey: 'abc', dtag: 'ok' }
+    ]);
+  });
+
+  it('leeres tag-array → leere liste', () => {
+    expect(parseTranslationRefs(ev([]))).toEqual([]);
+  });
+});
diff --git a/app/src/lib/nostr/translations.ts b/app/src/lib/nostr/translations.ts
new file mode 100644
index 0000000..8b1cd6c
--- /dev/null
+++ b/app/src/lib/nostr/translations.ts
@@ -0,0 +1,27 @@
+import type { NostrEvent } from './loaders';
+
+export interface TranslationRef {
+  kind: number;
+  pubkey: string;
+  dtag: string;
+}
+
+const COORD_RE = /^(\d+):([0-9a-f]+):([a-z0-9][a-z0-9-]*)$/;
+
+export function parseTranslationRefs(event: NostrEvent): TranslationRef[] {
+  const refs: TranslationRef[] = [];
+  for (const tag of event.tags) {
+    if (tag[0] !== 'a') continue;
+    if (tag[3] !== 'translation') continue;
+    const coord = tag[1];
+    if (typeof coord !== 'string') continue;
+    const m = coord.match(COORD_RE);
+    if (!m) continue;
+    refs.push({
+      kind: parseInt(m[1], 10),
+      pubkey: m[2],
+      dtag: m[3]
+    });
+  }
+  return refs;
+}
diff --git a/app/vite.config.ts b/app/vite.config.ts
index 1955da7..ed494ba 100644
--- a/app/vite.config.ts
+++ b/app/vite.config.ts
@@ -4,7 +4,7 @@ import { defineConfig } from 'vitest/config';
 export default defineConfig({
 	plugins: [sveltekit()],
 	test: {
-		include: ['tests/unit/**/*.{test,spec}.{js,ts}'],
+		include: ['tests/unit/**/*.{test,spec}.{js,ts}', 'src/**/*.{test,spec}.{js,ts}'],
 		environment: 'jsdom',
 		globals: true
 	}