Xamarin.forms Change Language at runtime - xamarin.forms

Question

I have a login page and my code is this:
<ContentPage.Content>
<Grid>
<StackLayout Orientation="Vertical" Padding="20">
<Entry Placeholder="{x:Static resources:AppResources.EMB_PLACEHOLDER}" Keyboard="Numeric" Text="{Binding EMB}"></Entry>
<Button Text="{x:Static resources:AppResources.LOGIN_BTN}" TextColor="White" Padding="0,-20" BackgroundColor="#07987f" Command="{Binding LoadLoginCommand}"></Button>
<Label
Margin="0,10,0,0" >
<Label.FormattedText>
<FormattedString>
<Span Text="{x:Static resources:AppResources.MESSAGE} "></Span>
</FormattedString>
</Label.FormattedText>
</Label>
<Grid Margin="0,10,0,0" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Label Padding="20,0,0,0" Text="{x:Static resources:AppResources.LBLLANGUAGE}" VerticalOptions="Center" FontSize="Body" TextColor="Gray" Grid.Column="0"/>
<Picker x:Name="languagePicker" Grid.Column="1" ItemsSource="{Binding Languages}" Title="{x:Static resources:AppResources.LBLLANGUAGE}" ItemDisplayBinding="{Binding Name}" SelectedItem="{Binding SelectedLanguage, Mode=TwoWay}"></Picker>
</Grid>
</StackLayout>
<StackLayout HorizontalOptions="Center" VerticalOptions="Center">
<ActivityIndicator IsVisible="{Binding IsBusy}" IsRunning="{Binding IsBusy}" HorizontalOptions="Center" VerticalOptions="Center"></ActivityIndicator>
<Label Text="{x:Static resources:AppResources.TSMSG1}" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" HorizontalOptions="Center" VerticalOptions="Center" IsVisible="{Binding IsBusy}"/>
</StackLayout>
</Grid>
</ContentPage.Content>
Have a picker with list of languages. Also have resx file for every language. My scenario is when i click on picker and select some language i want to change the language of all text on the login page in choosed language in realtime. Any idea how to do it?

Answer 1

The first link provided in the comments is an awesome solution, however for the shake of simplicity, a very simple way of doing what you want is to bind the control's text to properties in the ViewModel:
<Label Text="{Binding TSMSG1}"...
rather than using
<Label Text="{x:Static resources:AppResources.TSMSG1}"...
Then in your ViewModel you would have a property TSMSG1 (and others) that you manually update when the language changes. Of course those properties need to follow INPC pattern for the changes to be reflected on the view.
I would not recommend doing this everywhere because bindings are expensive for your app performance, but it should be fine for the screen that changes the language.