Some languages (Japanese, Chinese, etc.) are not supported by the default font included with the plugin, in this case a custom font is required. 1. First, copy all the files in wp-content/plugins/woocommerce-pdf-invoices-packing-slips/templates/Simple/ to the following path in the (sub)topic: wp-content/themes/my-(child)theme-folder/woocommerce/pdf/my-template/ Name the parts in bold in the path. Normally All