Traveller or Traveler?
Exemple : ‘’The traveller had a very heavy rucksack on his back.’’
The spelling of the word "traveller" varies between British and American English. It is always spelt with a double letter "l" in the British spelling.
Exemple : ‘’The hotel welcomes dozens of travelers every week.’’
The American English spelling contains only one "l" in the same way that words such as "cancelled" and "woollen" have a double "l" in the British spelling but have only one in the American version.