Setting "Explicit languages" does not work

[JanPichl]

Using the following code from the example.

<l:LanguageSelector>
    <l:Language Culture="de-DE"
                FlagSource="pack://application:,,,/Gu.Wpf.Localization;component/Flags/de.png" />
    <l:Language Culture="en-GB"
                FlagSource="pack://application:,,,/Gu.Wpf.Localization;component/Flags/gb.png" />
    <l:Language Culture="sv-SE"
                FlagSource="pack://application:,,,/Gu.Wpf.Localization;component/Flags/se.png" />
</l:LanguageSelector>

Throws the following errors in the XAML designer:

• XDG0023 The type "Language" does not include any accessible constructors.
• XLS0507 Type 'Language' is not usable as an object element because it is not public or does not define a public parameterless constructor or a type converter.

[JanPichl]

Broken by the commit on 28.6.2020 13:13-> by removing the parameterless constructor.