1. For the purposes of Article 76(1), first sentence, and Rule 36(2), first sentence, EPC, a European divisional application of an earlier European patent application which was filed in an EPO official language must also be filed in the EPO official language of the earlier application. Otherwise, it is filed in an inadmissible language. In this case a correction of the language deficiency by means of a translation into the language of the proceedings for the earlier application is neither required under Rule 36(2), second sentence, EPC nor is it even admissible in view of the wording of that provision and the Enlarged Board's decision G 4/08. Nor is it possible for the applicant to remedy the language deficiency in its divisional application by means of a correction under Rule 139, first sentence, EPC or by means of an amendment under Article 123(2) EPC.

2. In accordance with the established jurisprudence of the boards of appeal, a European divisional application which was filed in an inadmissible language cannot be treated as a valid divisional application by analogous application of Article 90(2) EPC.