Hi,

Because of GDPR i disabled all google fonts and hosted locally. I tried with SP font book but experienced difficulties with Italic text parts. So i added with CSS.

It is working for SP Pages. Unfortunately, i did not manage for the menu to use the Open Sans font. I already added code to custom.css but it did not work.

.sp-megamenu-parent > li > a {
        font-family: 'Open Sans', sans-serif;
    text-decoration: none;
}

@font-face {
    font-family: 'Open Sans';
    src: url('../fonts/OpenSans-Bold.woff2') format('woff2');
    font-weight: bold;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Open Sans';
    src: url('../fonts/OpenSans-MediumItalic.woff2') format('woff2');
    font-weight: 500;
    font-style: italic;
    font-display: swap;
}

@font-face {
    font-family: 'Open Sans';
    src: url('../fonts/OpenSans-Light.woff2') format('woff2');
    font-weight: 300;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Open Sans';
    src: url('../fonts/OpenSans-Regular.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Open Sans';
    src: url('../fonts/OpenSans-SemiBold.woff2') format('woff2');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}