On 31 August 2015, the Indonesian Supreme Court announced its decision in the case PT Bangun Karya Pratama v. Nine AM Ltd. concerning the extensive field of appliaction of the language law (Law No. 24 of 2009 regarding Flag, Language and Symbol of State and National Anthem) from 9 July 2009.
According to article 31 of the law, the Indonesian language had to be used in all contracts with Indonesian public institutions. The article, however, did not specify whether the requirement was required in private contracts between an Indonesian and a foreign entity, which are implemented on Indonesian soil.
With the decision of the Supreme Court in place, all contracts with an Indonesian body and to be implemented on Indonesian soil will require at least one copy in the Bahasa Indonesia language. All contracts not fulfilling this requirement shall be declared void.
The decision is not yet available online.