diff --git a/app/src/main/kotlin/com/chmouel/liseur/reader/PageSwaps.kt b/app/src/main/kotlin/com/chmouel/liseur/reader/PageSwaps.kt
index 58ada0b6..9ee2789e 100644
--- a/app/src/main/kotlin/com/chmouel/liseur/reader/PageSwaps.kt
+++ b/app/src/main/kotlin/com/chmouel/liseur/reader/PageSwaps.kt
@@ -340,10 +340,10 @@ internal object PageSwaps {
             selectionIntersectsAppliedSwap(url, s) {
               if (!here(url)) return null;
               const selection = window.getSelection();
-              if (!selection || selection.rangeCount === 0 || selection.isCollapsed) return false;
+              if (!selection || selection.rangeCount === 0 || selection.isCollapsed) return null;
               let at = null;
               try { at = locate(s.selector, s.before, s.text); } catch (e) {}
-              if (!at) return false;
+              if (!at) return null;
               const bounds = new Map();
               for (let i = at.start; i <= at.end; i++) {
                 const node = at.nodes[i];
diff --git a/app/src/main/kotlin/com/chmouel/liseur/reader/TranslatedPages.kt b/app/src/main/kotlin/com/chmouel/liseur/reader/TranslatedPages.kt
index 6046746b..c54d2f66 100644
--- a/app/src/main/kotlin/com/chmouel/liseur/reader/TranslatedPages.kt
+++ b/app/src/main/kotlin/com/chmouel/liseur/reader/TranslatedPages.kt
@@ -69,6 +69,8 @@ internal object TranslatedPages {
     /** The selected words as the translated page currently shows them. */
     @OptIn(ExperimentalReadiumApi::class)
     suspend fun selectedText(nav: EpubNavigatorFragment): String? {
+        val web = visibleWebView(nav.publicationView) ?: return null
+        val url = web.url ?: return null
         val result = try {
             withTimeoutOrNull(ANSWER_MS) {
                 nav.evaluateJavascript(SELECTION_TEXT_SCRIPT)
@@ -78,7 +80,7 @@ internal object TranslatedPages {
         } catch (_: Exception) {
             null
         } ?: return null
-        return decodeSelectionText(result)
+        return decodeSelectionText(result)?.takeIf { stillShows(nav, web, url) }
     }
 
     @OptIn(ExperimentalReadiumApi::class)
diff --git a/app/src/test/kotlin/com/chmouel/liseur/reader/PageSwapsTest.kt b/app/src/test/kotlin/com/chmouel/liseur/reader/PageSwapsTest.kt
index 9545862c..9566a51e 100644
--- a/app/src/test/kotlin/com/chmouel/liseur/reader/PageSwapsTest.kt
+++ b/app/src/test/kotlin/com/chmouel/liseur/reader/PageSwapsTest.kt
@@ -78,6 +78,12 @@ class PageSwapsTest {
         assertTrue(js.contains("edits.get(node)"))
         assertTrue(js.contains("range.compareBoundaryPoints(Range.END_TO_START, changed)"))
         assertTrue(js.contains("range.compareBoundaryPoints(Range.START_TO_END, changed)"))
+        val body = js.substringAfter("selectionIntersectsAppliedSwap(url, s) {")
+            .substringBefore("markedAt(url, s, fx, fy) {")
+        assertTrue(
+            body.contains("if (!selection || selection.rangeCount === 0 || selection.isCollapsed) return null;"),
+        )
+        assertTrue(body.contains("if (!at) return null;"))
     }
 
     @Test