With the resumption of Parliament on Wednesday 25 September, the importance of how we use language came sharply into focus. In the highly charged atmosphere of the House of Commons, one MP warned against the dangers of using ‘offensive, dangerous or inflammatory language’. Speaking on the BBC Radio 4 Today programme, Brendan Cox, husband of the murdered MP Jo Cox, put succinctly the reason why this important: ‘because it has real world consequences’. How we use languages – and which languages we choose to learn and to speak – identifies who we are, how we view the world, and how we relate to others. Language matters.