If you woke up tomorrow with the ability to speak and understand any language in the world, what would you do with this newfound skill and how would it impact your life?

If I had this ability, it would make it very easy for me to travel anywhere in the world, but also I'll know full well what everyone is saying, regardless of where I am, in any place and time. And I can use this knowledge to know full well if someone is slagging me off in their native tongue.