36As regards the claims alleging infringement of essential procedural requirements and of Regulation No 1 and Article 3 TEU and Article 41(4) of the Charter, it is clear from the case-law of the Court of Justice, referred to by the General Court in paragraph 115 of the judgment under appeal, that the use of the language laid down in Article 3 of Regulation No 1 does not constitute an essential procedural requirement, within the meaning of Article 263 TFEU, the infringement of which necessarily affects the validity of any document addressed to a person in another language (see, to that effect, judgment of 15 July 1970 in ACF Chemiefarma v Commission, 41/69, EU:C:1970:71, paragraphs 47 to 52). According to that case-law, where an institution sends a person within the jurisdiction of a Member State a document which is not drawn up in the language of that State, such a process vitiates the procedure only if it gives rise to harmful consequences for that person in the course of the administrative procedure.
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