Official documents, including the language versions, can be accessed and downloaded through the United Nations official document system (ODS). The ODS website is hosted by the United Nations and not by UNICEF.
Go to to the ODS home page: http://documents.un.org/
Click on 'Welcome' in the language you prefer. This will take you to the ODS search page.
Click on the 'Simple Search' link. Enter the available information in the designated fields and click 'Search'. The results will display the desired document in all the languages available.