<P> Meanwhile, a proposal had been in the works to add Spanish as a third working language in addition to English and French . This was adopted in Resolution 262 (III), passed on 11 December 1948 . </P> <P> In 1968, Russian was added as a working language of the General Assembly so that, of the GA's five official languages, four (all but Chinese) were working . </P> <P> In 1973, the General Assembly made Chinese a working language and added Arabic as both an official language and working language of the GA . Thus all six official languages were also working languages . Arabic was made an official and working language of "the General Assembly and its Main Committees", whereas the other five languages had status in all GA committees and subcommittees (not just the main committees). The Arab members of the UN had agreed to pay the costs of implementing the resolution, for three years . </P> <P> In 1980, the General Assembly got rid of this final distinction, making Arabic an official and working language of all its committees and subcommittees, as of 1 January 1982 . At the same time, the GA requested the Security Council to include Arabic among its official and working languages, and the Economic and Social Council to include Arabic among its official languages, by 1 January 1983 . </P>

Which of the following is not an official language of the united nations