Change the Breadcrumb Delimiter in WooCommerce

To change the breadcrumb delimiter in WooCommerce, use the following filter:

function in_woocommerce_breadcrumb_defaults($args){
    $args['delimiter']   = ' | ';
    return $args;
}
add_filter('woocommerce_breadcrumb_defaults','in_woocommerce_breadcrumb_defaults');

In this case we replaced the slash with a vertical bar. Here are all the values you can change with this filter:

array(
   'delimiter'   => ' / ',
   'wrap_before' => '<nav class="woocommerce-breadcrumb">',
   'wrap_after'  => '</nav>',
   'before'      => '',
   'after'       => '',
   'home'        => _x( 'Home', 'breadcrumb', 'woocommerce' ),
)