Some Czech language letters not showing in correct font

some of the special Czech letters are showing differently - the font is not correct. It is " ě " and " ů " or " ř "…
Please see the attachment, where you can see examples.
Is it please possible to improve this?
Thank you

Hello Radka,

Please provide a link to the website and I will check it

Hi Noda, sorry, this is the link

It works well in Safari only, I think

Hi there

In this case, this is the browser-related issue and not theme related, the theme just renders the font assigned in the backend, try to change font to something else and check again, also, test your font on the default Wordpress theme