Question

Switching to RightToLeft (by altering MainWindow.FlowDirection) changes strings which have a round (closing) paranthesis at the end by placing it as an opening paranthesis at the start.

Is something that I’m missing? Is this a bug? Is it normal?

This is how things look with RTL enabled:

.. and this is how things look with RTL disabled:

Notice how the paranthesis change?

Answer 1

Unfortunately this is a known WPF bug.
The workaround is to have an invisible character after the string:

<TextBlock FlowDirection="RightToLeft">                    
    <Run>Label1 (cms)</Run>
    <Run FontSize=".01">i</Run>
</TextBlock> 

Or use

HorizontalContentAlignment="Right" 

Instead of

FlowDirection="RightToLeft"