The verb bespeak admits two past participles: bespoke and bespoken. I am interested in the attributive usage of these terms.
A bespoke suit is one tailored to please and to fit a particular customer. Occasionally, bespoken is used in the same sense. I am puzzled by the difference. Personally I find bespoken to be rarer, and Google seems to concur.
My question is, whether the two are interchangeable, or wheherwhether a preference of one over the other is significant in terms of register, region, or whether there is actually a nuance in meaning.