Change the Watermark (StringDatePickerDayText) on DatePicker

[Ashyx93]

Hello,

I'm trying to change the watermark text on a DatePicker in my application, just to display it in a different language.

I figured out that the text is fetched from the 'StringDatePickerDayText' resource.
However I haven't been able to change it, neither by trying to set the Key in the component directly, nor by creating a new Avalonia axaml-Resource and implementing it in my app.axaml:

Example for the component

<DatePicker DayFormat="dd"
	            MonthFormat="MMMM">
		<DatePicker.Resources>
			<ResourceDictionary>
				<ResourceDictionary.MergedDictionaries>
					<ResourceDictionary>
						<x:String x:Key="StringDatePickerDayText">Tag</x:String>
					</ResourceDictionary>
				</ResourceDictionary.MergedDictionaries>
			</ResourceDictionary>
		</DatePicker.Resources>
</DatePicker>

or app.axaml

<Application.Resources>
	<ResourceDictionary>
		<ResourceDictionary.MergedDictionaries>
			<ResourceInclude Source="avares://XXX.XXXXXX.UI/Strings/InvariantResources.axaml/Strings/InvariantResources.axaml" />
		</ResourceDictionary.MergedDictionaries>
	</ResourceDictionary>
</Application.Resources>

Is there anything I am missing or what am I doing wrong?