PDF export cannot print Czech words

Forms SharePoint 2019
1

Hi,
I have followed the manual to export PDF from a form and I have got a problem with diacritics.
I also downloaded the correct font - Deja Vu Sans:

This is CSS:

@font-face {
    font-weight: bold;
    font-style: italic;
    font-family: 'DejaVuSans';
    src: url('{currentWeb}/Fonts/DejaVuSans.ttf') format('truetype');
}

.k-pdf-export, .k-pdf-export .k-grid-content {
    font-family: 'DejaVuSans' !important;
}

Javascript:

fd.spRendered(function(){
    
fd.pdfOptions = {
    paperSize: 'A4',
    landscape: true,
    margin: {
        left   : '5mm',
        top    : '5mm',
        right  : '5mm',
        bottom : '5mm'
    }
};
  
});

Look of the form:
image

And the exported PDF file look:
image

EDIT: The values linked to the labels (titles) are OK , only the titles of the data field are wrong.
This is entire CSS sheet:

@font-face {
    font-weight: bold;
    font-style: italic;
    font-family: 'DejaVuSans';
    src: url('{currentWeb}/DejaVuSans.ttf') format('truetype');
}

.row {
    margin-bottom: -10px;
    
}

.row:nth-child(even) {
background-color: #f3f4f6;
font-size: 15px;
}

.fd-form .col-form-label {
font-size: 10px;

}

.fd-form .fd-title-wrap {
font-weight: bold;
}


.k-pdf-export, .k-pdf-export .k-grid-content {
    font-family: 'DejaVuSans' !important;
}

Could you help me please?
Steo

2

Dear @Stepan,
Looks like the font is not being applied, or am I wrong? Are there any other styles on the form that might be overwriting the font change with CSS? How are the labels created?

You can also try changing the font to something more different, to check whether font changes apply to labels or not.