lang:'auto',// enable language auto-detection option
theme:'gray',// adjust color theme of WProofreader to look more native to CKEditor 4
enableAutoSearchIn:['.cke_wysiwyg_frame'],// limit WProofreader work only to CKEditor 4. They hide the original element and create an iframe element with cke_wysiwyg_frame class.
serviceId:'ul8aNM6zBZAhogj'// the activation key for the Cloud-based version