50In that regard, it must be recalled that the objective of promoting and encouraging the use of one of the official languages of a Member State constitutes a legitimate objective which, in principle, justifies a restriction on the obligations imposed by EU law (see, to that effect, judgments of 28 November 1989 in Groener, C‑379/87, EU:C:1989:599, paragraph 19; of 12 May 2011 in Runevič-Vardyn and Wardyn, C‑391/09, EU:C:2011:291, paragraph 85, and of 16 April 2013 in Las, C‑202/11, EU:C:2013:239, paragraphs 25 to 27).
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