2.
Language of the proceedings

If an international application is filed with the receiving Office in one of the EPO official languages, that language will be the language of the proceedings before the EPO and may not be changed either during the international phase or on entry into the European phase (G 4/08).

R. 12.3

R. 55.2

OJ 2010, 572

If the international application is not filed with the receiving Office in one of the EPO official languages, the language of the proceedings before the EPO as International Authority will be the language of the translation furnished for the purposes of the search or, as the case may be, for the international preliminary examination.

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