The Articles of Agreement of the Asian Infrastructure Investment Bank were negotiated in English. Article 34 specifies that the working language of AIIB will be English, and that the Bank shall rely on the English text of the Articles for all decisions and for interpretations of the Articles.

The Articles were signed in English, Chinese and French texts, which are equally authentic. The English text can be found here. The Chinese text can be found here.The French text can be found here.

During the negotiations of the Articles, the Chief Negotiators agreed that certain formulations in the text represented general understandings which needed to be recorded. The Chief Negotiators' Report, adopted in tandem with the final text of the Articles, summarizes these understandings, for future reference in interpreting the Articles. The text of the Chief Negotiators' Report can be found here.