Try working for a US company in the UK. It's literally the most frustrating thing at work.
I quickly learned to start speaking like an American once I moved here because it was simply easier to make myself understood. I say words like, "waarder", "dayder", "shedule", "restroom", and "gasoline"; much to the chagrin of some of my family members who still speak with a very British accent.
I can confirm that!After 10 years I still have my Burnley accent..