Translation needed

Hello, I'm trying to create a deposit invoice but a translation part is missing : all the table labels seems to be in polish for the "related quotation". you can see a screenshot here : https://www.dropbox.com/s/upjhbqyox5y50nd/Capture%20d%27%C3%A9cran%202015-02-06%2011.58.29.png?dl=0 Thx for your corrections.