ADDITIONAL SYSTEM INFORMATION :
java version "11.0.2" 2019-01-15 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.2+9-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.2+9-LTS, mixed mode)

A DESCRIPTION OF THE PROBLEM :
The String describing the extended modifier keys and mouse buttons returned by java.awt.event.InputEvent.getModifiersExText( int ) is no longer localized, but always returns the English modifier keys and mouse button names.
Tested with Locale.GERMAN and Locale.ITALIAN

Might be related to https://bugs.java.com/bugdatabase/view_bug.do?bug_id=8214574

REGRESSION : Last worked in version 8u201

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run the given code

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
"CTRL in German: Strg" is printed to the console
ACTUAL -
"CTRL in German: Ctrl" is printed to the console

---------- BEGIN SOURCE ----------
import java.awt.event.InputEvent;
import java.util.Locale;

public class InputEventTest {
    
    public static void main(String[] args) {
        Locale.setDefault(Locale.ITALIAN);
        System.out.println("CTRL in German: " +
            InputEvent.getModifiersExText(InputEvent.CTRL_DOWN_MASK));
    }
    
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Patching java.desktop module with sun.awt.resources.awt_[LANGUAGE_CODE].java from Java 10 or earlier

FREQUENCY : always