The rules for the International Commercial Contracts EU, The main ones are:

• The national law 
• Brussels Convention of 1968
• Rome Convention of 1980
• Community Regulation UE 593/2008
• Vienna Convention on the International Sale of Goods of 1980
• Private law collections of principles and customs of international trade practice developed by the ICC, UNIDROIT, and INCOTERMS

1. The legally relevant official language of the International Commercial Contract is english  
2. The competent judge of the International Commercial Contract are the Ordinary courts identified in the contractual clauses or the international arbitration 

In the International Commercial Contract all agreements between seller and buyer are set out in the contractual clauses:

• Contract rule
• Language of the contract
• Modes and responsable of the transport of the goods
• Judge of the contract

Legal assistance for international sales contracts is absolutely indispensable

Explain your case and ask for the advice online from the International law firm Damiani&Damiani