At the EPO the scope of a SIS is the same as for any other international search carried out by the EPO as ISA and is not limited to documentation in a specific language.[GL/ISPE 15.93; ]
If an ISR from the main ISA is already available when the examiner carries out the SIS, it will be taken into account when establishing the SISR and written opinion.
Source: http://www.epo.org/law-practice/legal-texts/html/guidelinespct/e/b_xii_4.htm
Date retrieved: 17 May 2021