US secretary of state Marco Rubio has ordered diplomatic correspondence to stop using the Calibri font and return to the more traditional Times New Roman.

The move reverses a shift by Joe Biden’s administration to the less formal typeface that Mr Rubio called wasteful, confusing and unbefitting the dignity of US government documents.

“Typography shapes how official documents are perceived in terms of cohesion, professionalism and formality,” Mr Rubio said in a cable sent to all US embassies and consulates abroad.

In it, he said the 2023 shift to the sans serif Calibri font emerged from misguided diversity, equity and inclusion policies pursued by his predecessor, Antony Blinken.

Mr Rubio ordered an immediate return to Times New Roman, which had been among the standard fonts mandated by

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