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In a CSS, an @font-face declaration must be added. The following example shows the syntax as it would be used on the RIBO platform (SemanticoHighwire):

@font-face

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{

 
     font-family: 'Aegean';

      src:    url('../fonts/Aegean.eotwoff2') format('embedded-opentypewoff2'); /* IE8, IE9  */
    src:    local('☺'),
    url('../fonts/,
         url('Aegean.woff') format('woff'), /* Modern browsers */
    ;
    font-style: normal;

      font-weight: normal;

      text-rendering: optimizeLegibility;

}

In the same CSS, a :lang() pseudo-class must be added as well:

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