diff --git a/src/lib/pages/SettingsPage.svelte b/src/lib/pages/SettingsPage.svelte
index a78d137..1019fcf 100644
--- a/src/lib/pages/SettingsPage.svelte
+++ b/src/lib/pages/SettingsPage.svelte
@@ -196,15 +196,19 @@
   async function addBulkVocabTerms() {
     const raw = bulkVocabText;
     // Accept newline-separated OR comma-separated (or mixed) — whichever the
-    // user pasted. Trim each entry, drop empties, dedupe within the input.
-    const candidates = Array.from(
-      new Set(
-        raw
-          .split(/[\n,]+/)
-          .map((entry) => entry.trim())
-          .filter((entry) => entry.length > 0),
-      ),
-    );
+    // user pasted. Trim each entry, drop empties, and dedupe case-insensitively
+    // so "ACME" and "acme" in the same paste collapse to a single term
+    // (Whisper prompts don't care about case).
+    const seen = new Set();
+    const candidates = [];
+    for (const entry of raw.split(/[\n,]+/)) {
+      const trimmed = entry.trim();
+      if (!trimmed) continue;
+      const key = trimmed.toLowerCase();
+      if (seen.has(key)) continue;
+      seen.add(key);
+      candidates.push(trimmed);
+    }
     if (candidates.length === 0) {
       vocabularyError = "Nothing to import — paste one term per line or separated by commas.";
       return;