Text within Checkbox is not updated with localized String

I'm seeing a strange bug with my android application, where I've a checkbox which is associated with a dialog (ie' which shows up in UI as part of dialog).

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="vertical"
              >
    <FrameLayout
        android:layout_width="@dimen/dialog_width"
        android:layout_height="wrap_content">

        <CheckBox
            android:id="@+id/checkbox1"            
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="?android:attr/textColorPrimary"
            android:button="@null"
            android:text="@string/textcontent"
            android:textSize="@dimen/checkbox_text_size"
            android:layout_gravity="end|center_vertical"
            android:gravity="end"/>
    </FrameLayout>
</LinearLayout>

When the language is set as Japanese ie' when the locale is set to JP - the jp resource corresponding to the string is not shown in UI.

Note: Tried debugging this issue with UIAutomatorViewer - I could see the japanese value for the string textcontent is replaced within the layout - but the value seen on the screen is english. I'm not sure why this discrepancy is observed.

Some help here would be appreciated !!