From the the Financial Times (gated, but can be read with a free registration):

From October, no officer will be promoted to a sub-unit command – effectively any rank above captain – unless they can speak a foreign language, preferably French or Arabic, senior army officials have told the Financial Times

  • Language training will be available to any officer or soldier

Language made obligatory for senior British officers

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Although not mentioned, I’m pretty sure Scottish will count. Not sure about ozztralian.