diff --git a/CHANGELOG.md b/CHANGELOG.md
index 994b2564..968ce1be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ Version counting is based on semantic versioning (Major.Feature.Patch)
 * Migrate Flow implementation from OpenGL to QRhi. This is a full new implementation with better performance and compatibility with operating systems and hardware.
 * Add light/dark themes support that follow the system configuration.
 * Add a theme editor and support for custom themes.
+* Add an application language setting with a system default option in YACReader and YACReaderLibrary.
 
 ## 9.16.4
 
diff --git a/custom_widgets/whats_new_dialog.cpp b/custom_widgets/whats_new_dialog.cpp
index bd4a1546..5718ee7b 100644
--- a/custom_widgets/whats_new_dialog.cpp
+++ b/custom_widgets/whats_new_dialog.cpp
@@ -48,6 +48,7 @@ YACReader::WhatsNewDialog::WhatsNewDialog(QWidget *parent)
                    "   &#8226; Migrate Flow implementation from OpenGL to QRhi. This is a full new implementation with better performance and compatibility with operating systems and hardware<br/>"
                    "   &#8226; Add light/dark themes support that follow the system configuration<br/>"
                    "   &#8226; Add a theme editor and support for custom themes<br/>"
+                   "   &#8226; Add an application language setting with a system default option in YACReader and YACReaderLibrary<br/>"
                    "<br/>"
                    "I hope you enjoy the new update. Please, if you like YACReader consider to become a patron in <a href=\"https://www.patreon.com/yacreader\" style=\"color:%1;\">Patreon</a> "
                    "or donate some money using <a href=\"https://www.paypal.com/donate?business=5TAMNQCDDMVP8&item_name=Support+YACReader\" style=\"color:%1;\">Pay-Pal</a> and help keeping the project alive. "