As an eBay SDK user, I would like to provide a content language to my creation and update requests so that I can easily sell on different eBay marketplaces.

[rjdavis3]

Right now Content-Language is hardcoded to en-US in EbayClientImpl. Need to change this so it is passed to request or maybe read from current Marketplace enum selection so that marketplaces with other languages can be supported.

[fpli]

hi, do need ebay source code from china shanghai site? it's free.