Rule 1 1

Derogations from the provisions concerning the language of the proceedings in written proceedings

(1) In written proceedings before the European Patent Office any party may use any official language of the European Patent Office. The translation referred to in Article 14, paragraph 4, may be filed in any official language of the European Patent Office.

(2) Amendments to a European patent application or European patent must be filed in the language of the proceedings.

(3) Documents to be used for purposes of evidence before the European Patent Office, and particularly publications, may be filed in any language. The European Patent Office may, however, require that a translation be filed, within a given time limit of not less than one month, in one of its official languages.