Dimensions locale

Currently on viewer no matter the lang parameter on the viewer the dimensions remain on the English language. Is this on viewer or Rudolf side?

http://apps.openbudgets.eu/viewer/budget-athens-expenditure-2010__6a8b3?measure=%22amount.sum%22&groups%5B%5D=%22organization.notation%22&order=%22amount.sum%7Cdesc%22&visualizations%5B%5D=%22Treemap%22&lang=el