Claim: Treaty of Limerick,  which was signed on the 3rd of October 1691 in Limerick, was written in English.
Evidence: Limerick was besieged several times in the 17th century. It was besieged three times in the 17th century, resulting in the famous Treaty of Limerick and the flight of the defeated Catholic leaders abroad. On 3 October 1691 the famous Treaty of Limerick was signed using a large stone set in the bridge as a table. 
The Treaty of Limerick (Irish: Conradh Luimnigh), signed on 3 October 1691, ended the 1689 to 1691 Williamite War in Ireland, a conflict related to the 1688 to 1697 Nine Years' War. It consisted of two separate agreements, one with military terms of surrender, signed by commanders of a French expeditionary force and Irish Jacobites loyal to the exiled James II. Treaty of Limerick 3 October 1691 English