diff --git a/autotests/syntaxrepository_test.cpp b/autotests/syntaxrepository_test.cpp
--- a/autotests/syntaxrepository_test.cpp
+++ b/autotests/syntaxrepository_test.cpp
@@ -276,6 +276,7 @@
         QVERIFY(def.indenter().isEmpty());
         QVERIFY(def.author().isEmpty());
         QVERIFY(def.license().isEmpty());
+        QVERIFY(!def.foldingEnabled());
         QVERIFY(!def.indentationBasedFoldingEnabled());
         QVERIFY(def.foldingIgnoreList().isEmpty());
         QVERIFY(def.keywordLists().isEmpty());
@@ -307,6 +308,39 @@
         for (QChar c : QStringLiteral(",{}[]"))
             QVERIFY(def.isWordWrapDelimiter(c));
     }
+
+    void testFoldingEnabled()
+    {
+        // test invalid folding
+        Definition def;
+        QVERIFY(!def.isValid());
+        QVERIFY(!def.foldingEnabled());
+        QVERIFY(!def.indentationBasedFoldingEnabled());
+
+        // test no folding
+        def = m_repo.definitionForName(QLatin1String("ChangeLog"));
+        QVERIFY(def.isValid());
+        QVERIFY(!def.foldingEnabled());
+        QVERIFY(!def.indentationBasedFoldingEnabled());
+
+        // C++ (itself has no regions, since it includes ISOC++
+        def = m_repo.definitionForName(QLatin1String("C++"));
+        QVERIFY(def.isValid());
+        QVERIFY(def.foldingEnabled());
+        QVERIFY(!def.indentationBasedFoldingEnabled());
+
+        // ISO C++ itself has folding regions
+        def = m_repo.definitionForName(QLatin1String("ISO C++"));
+        QVERIFY(def.isValid());
+        QVERIFY(def.foldingEnabled());
+        QVERIFY(!def.indentationBasedFoldingEnabled());
+
+        // Python has indentation based folding
+        def = m_repo.definitionForName(QLatin1String("Python"));
+        QVERIFY(def.isValid());
+        QVERIFY(def.foldingEnabled());
+        QVERIFY(def.indentationBasedFoldingEnabled());
+    }
 };
 }
 
diff --git a/src/lib/definition.h b/src/lib/definition.h
--- a/src/lib/definition.h
+++ b/src/lib/definition.h
@@ -220,6 +220,15 @@
      */
     bool isWordWrapDelimiter(QChar c) const;
 
+    /**
+     * Returns whether the highlighting supports code folding.
+     * Code folding is supported either if the highlighting defines code folding
+     * regions or if indentationBasedFoldingEnabled() returns @e true.
+     * @since 5.50
+     * @see indentationBasedFoldingEnabled()
+     */
+    bool foldingEnabled() const;
+
     /**
      * Returns whether indentation-based folding is enabled.
      * An example for indentation-based folding is Python.
diff --git a/src/lib/definition.cpp b/src/lib/definition.cpp
--- a/src/lib/definition.cpp
+++ b/src/lib/definition.cpp
@@ -182,6 +182,21 @@
     return std::binary_search(d->wordWrapDelimiters.constBegin(), d->wordWrapDelimiters.constEnd(), c);
 }
 
+bool Definition::foldingEnabled() const
+{
+    d->load();
+    if (d->hasFoldingRegions || indentationBasedFoldingEnabled()) {
+        return true;
+    }
+
+    // check included definitions
+    for (const auto &def : includedDefinitions()) {
+        if (def.foldingEnabled())
+            return true;
+    }
+    return false;
+}
+
 bool Definition::indentationBasedFoldingEnabled() const
 {
     d->load();
@@ -670,6 +685,7 @@
 
 quint16 DefinitionData::foldingRegionId(const QString &foldName)
 {
+    hasFoldingRegions = true;
     return RepositoryPrivate::get(repo)->foldingRegionId(name, foldName);
 }
 
diff --git a/src/lib/definition_p.h b/src/lib/definition_p.h
--- a/src/lib/definition_p.h
+++ b/src/lib/definition_p.h
@@ -76,6 +76,7 @@
     QHash<QString, Format> formats;
     QString wordDelimiters;
     QString wordWrapDelimiters;
+    bool hasFoldingRegions = false;
     bool indentationBasedFolding = false;
     QStringList foldingIgnoreList;
     QString singleLineCommentMarker;