[troupo]

You don't need consent in this case, as clearly stated in 3.6 UI customization cookies

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3.6 UI customization cookies

These customization functionalities are thus explicitly enabled by the user of an information society service (e.g. by clicking on button or ticking a box) although in the absence of additional information the intention of the user could not be interpreted as a preference to remember that choice for longer than a browser session (or no more than a few additional hours). As such only session (or short term) cookies storing such information are exempted under CRITERION B

--- end quote ---

[jefftk]

See discussion above: https://news.ycombinator.com/item?id=38901520

As long as it's clear to the user that they're making a site-wide UI customization choice and just not choosing the language for this specific example I agree with you, but I don't think it's clear in the typical case.

[troupo]

IMO this is splitting hairs, and no one will take you to court because you changed the snippet language across the entire site for the session