Law No.805 on the Compulsory Use of Turkish in Economic Enterprises of 1926, still in force in Turkey, is an outdated law and should be repealed. However, until it is repealed, courts should interpret the Law in accordance with the facts of the world and of Turkey. In fact, international arbitration agreements are not covered by Law No.805. This is because the language in which contracts can be issued is a matter of form and the Turkish legislative authority put a separate legal regime into force regarding the form of international arbitration agreements (apart from Law No.805) by adopting the New York Convention of 1958, the European Convention of 1961 and the Law on International Arbitration. Since these regulations contain no requirement of language regarding arbitration agreements, an international arbitration agreement cannot be considered invalid only because it is not issued in Turkish. Nevertheless, even if one insists on international arbitration agreements to be covered under Law No.805, there will be no problem regarding international arbitration agreements provided that Law No.805 is interpreted and applied correctly. Arbitration agreements “within Turkey” and concluded between Turkish companies must be in Turkish and since an “arbitration agreement within Turkey” means an agreement without a cross-border element, arbitration agreements concerning cross-border relations do not comply with the “to be within Turkey” condition and accordingly are not subject to the Turkish requirement. Since “contracts” are not mentioned in article 2, which regulates Turkish requirement in terms of relations between foreign companies and natural or legal persons of Turkish nationality, arbitration agreements between such persons are not subject to the Turkish requirement. The sanction for not complying with the Turkish requirement is that the document issued in a foreign language is not taken into consideration in favour of the relevant company, but the party that ensures the agreement is drafted in a foreign language should not benefit from it.