Replaces Romanian diacritics from entire WordPress installation

functions.php

add_filter( 'gettext', 'remove_romanian_diacritics' );
function remove_romanian_diacritics( $translation ) {
    $diacritics = [ 'ă', 'â', 'î', 'ș', 'ț', 'Ă', 'Â', 'Î', 'Ș', 'Ț' ];
    $replace_with = ['a', 'a', 'i', 's', 't', 'A', 'A', 'I', 'S', 'T' ];
    $translation = str_replace( $diacritics, $replace_with, $translation );
    return $translation;
}