diff --git a/memento-note/components/contextual-ai-chat.tsx b/memento-note/components/contextual-ai-chat.tsx
index 580609f..44dcf1f 100644
--- a/memento-note/components/contextual-ai-chat.tsx
+++ b/memento-note/components/contextual-ai-chat.tsx
@@ -841,7 +841,7 @@ export function ContextualAIChat({
                                 <button
                                   key={l}
                                   className={`text-xs px-2.5 py-1 rounded-lg border transition-colors ${translateTarget === l ? 'bg-primary text-primary-foreground border-primary' : 'bg-card border-border hover:bg-accent'}`}
-                                  onClick={() => setTranslateTarget(l)}
+                                  onClick={() => { setTranslateTarget(l); setCustomLangInput(l); }}
                                 >{l}</button>
                               ))}
                             </div>
@@ -849,8 +849,8 @@ export function ContextualAIChat({
                               className="text-xs px-3 py-1.5 rounded-lg border border-border bg-card outline-none focus:border-primary w-full"
                               placeholder={t('ai.action.customLang') || 'Autre langue...'}
                               value={customLangInput}
-                              onChange={e => setCustomLangInput(e.target.value)}
-                              onKeyDown={e => { if (e.key === 'Enter' && customLangInput.trim()) { setTranslateTarget(customLangInput.trim()); setCustomLangInput('') } }}
+                              onChange={e => { const val = e.target.value; setCustomLangInput(val); setTranslateTarget(val); }}
+                              onKeyDown={e => { if (e.key === 'Enter' && translateTarget.trim()) { handleAction(action, translateTarget.trim()); } }}
                             />
                             <button
                               disabled={!!actionLoading || !translateTarget}
diff --git a/memento-note/scripts/fix-translation-ui.js b/memento-note/scripts/fix-translation-ui.js
new file mode 100644
index 0000000..0c416f1
--- /dev/null
+++ b/memento-note/scripts/fix-translation-ui.js
@@ -0,0 +1,51 @@
+const fs = require('fs');
+const path = require('path');
+const filePath = path.join(__dirname, '..', 'components', 'contextual-ai-chat.tsx');
+let src = fs.readFileSync(filePath, 'utf8');
+
+// Sync presets buttons
+const OLD_PRESET_CLICK = `onClick={() => setTranslateTarget(l)}`;
+const NEW_PRESET_CLICK = `onClick={() => { setTranslateTarget(l); setCustomLangInput(l); }}`;
+
+if (src.includes(OLD_PRESET_CLICK)) {
+  src = src.replace(OLD_PRESET_CLICK, NEW_PRESET_CLICK);
+  console.log('Fix 1: Preset buttons sync updated');
+} else {
+  console.error('Fix 1: OLD_PRESET_CLICK not found');
+  process.exit(1);
+}
+
+// Sync input and enable live update
+const OLD_INPUT_LOGIC = `onChange={e => setCustomLangInput(e.target.value)}\r\n                              onKeyDown={e => { if (e.key === 'Enter' && customLangInput.trim()) { setTranslateTarget(customLangInput.trim()); setCustomLangInput('') } }}`;
+// Fallback for different line endings if needed, but let's try matching a smaller part first
+const OLD_ONCHANGE = `onChange={e => setCustomLangInput(e.target.value)}`;
+const NEW_ONCHANGE = `onChange={e => { const val = e.target.value; setCustomLangInput(val); setTranslateTarget(val); }}`;
+
+const OLD_ONKEYDOWN = `onKeyDown={e => { if (e.key === 'Enter' && customLangInput.trim()) { setTranslateTarget(customLangInput.trim()); setCustomLangInput('') } }}`;
+const NEW_ONKEYDOWN = `onKeyDown={e => { if (e.key === 'Enter' && translateTarget.trim()) { handleAction(action, translateTarget.trim()); } }}`;
+
+if (src.includes(OLD_ONCHANGE)) {
+    src = src.replace(OLD_ONCHANGE, NEW_ONCHANGE);
+    console.log('Fix 2: Input onChange updated');
+} else {
+    console.error('Fix 2: OLD_ONCHANGE not found');
+    process.exit(1);
+}
+
+if (src.includes(OLD_ONKEYDOWN)) {
+    src = src.replace(OLD_ONKEYDOWN, NEW_ONKEYDOWN);
+    console.log('Fix 3: Input onKeyDown updated');
+} else {
+    console.error('Fix 3: OLD_ONKEYDOWN not found');
+    // Try without \r if it failed
+    const altOnKeyDown = OLD_ONKEYDOWN.replace('\r\n', '\n');
+    if (src.includes(altOnKeyDown)) {
+        src = src.replace(altOnKeyDown, NEW_ONKEYDOWN);
+        console.log('Fix 3: Input onKeyDown updated (alt line ending)');
+    } else {
+        process.exit(1);
+    }
+}
+
+fs.writeFileSync(filePath, src);
+console.log('Done!');