diff --git a/src/dialogs/katedialogs.cpp b/src/dialogs/katedialogs.cpp
--- a/src/dialogs/katedialogs.cpp
+++ b/src/dialogs/katedialogs.cpp
@@ -1243,9 +1243,10 @@
 
 void KateDictionaryBar::dictionaryChanged(const QString &dictionary)
 {
-    KTextEditor::Range selection = m_view->selectionRange();
+    const KTextEditor::Range selection = m_view->selectionRange();
     if (selection.isValid() && !selection.isEmpty()) {
-        m_view->doc()->setDictionary(dictionary, selection);
+        const bool blockmode = m_view->blockSelection();
+        m_view->doc()->setDictionary(dictionary, selection, blockmode);
     } else {
         m_view->doc()->setDefaultDictionary(dictionary);
     }
diff --git a/src/document/katedocument.h b/src/document/katedocument.h
--- a/src/document/katedocument.h
+++ b/src/document/katedocument.h
@@ -1234,12 +1234,14 @@
 
 public Q_SLOTS:
     void clearDictionaryRanges();
-    void setDictionary(const QString &dict, const KTextEditor::Range &range);
-    void revertToDefaultDictionary(const KTextEditor::Range &range);
+    void setDictionary(const QString &dict, const KTextEditor::Range &range, bool blockmode);
     void setDefaultDictionary(const QString &dict);
     void onTheFlySpellCheckingEnabled(bool enable);
     void refreshOnTheFlyCheck(const KTextEditor::Range &range = KTextEditor::Range::invalid());
 
+private:
+    void setDictionary(const QString &dict, const KTextEditor::Range &range);
+
 Q_SIGNALS:
     void dictionaryRangesPresent(bool yesNo);
     void defaultDictionaryChanged(KTextEditor::DocumentPrivate *document);
diff --git a/src/document/katedocument.cpp b/src/document/katedocument.cpp
--- a/src/document/katedocument.cpp
+++ b/src/document/katedocument.cpp
@@ -5563,6 +5563,19 @@
     emit dictionaryRangesPresent(false);
 }
 
+void KTextEditor::DocumentPrivate::setDictionary(const QString &newDictionary, const KTextEditor::Range &range, bool blockmode)
+{
+    if (blockmode) {
+        for (int i = range.start().line(); i <= range.end().line(); ++i) {
+            setDictionary(newDictionary, rangeOnLine(range, i));
+        }
+    } else {
+        setDictionary(newDictionary, range);
+    }
+
+    emit dictionaryRangesPresent(!m_dictionaryRanges.isEmpty());
+}
+
 void KTextEditor::DocumentPrivate::setDictionary(const QString &newDictionary, const KTextEditor::Range &range)
 {
     KTextEditor::Range newDictionaryRange = range;
@@ -5626,12 +5639,6 @@
     if (m_onTheFlyChecker && !newDictionaryRange.isEmpty()) {
         m_onTheFlyChecker->refreshSpellCheck(newDictionaryRange);
     }
-    emit dictionaryRangesPresent(!m_dictionaryRanges.isEmpty());
-}
-
-void KTextEditor::DocumentPrivate::revertToDefaultDictionary(const KTextEditor::Range &range)
-{
-    setDictionary(QString(), range);
 }
 
 void KTextEditor::DocumentPrivate::setDefaultDictionary(const QString &dict)