In Britain we spell "honour" and "colour" etc with "u". The "tonne" is the metric ton, spelled thus to distinguish it from the British imperial "ton". The weight of the metric tonne is slightly different from the British ton (no longer used), and from the American ton. All three are different.
Indeed we say "plait", and less often "braid". Our "biscuit" is what Americans call a "cookie". I think they have "biscuits" in the USA but they are not cookies. In Britain a "creek" is the last mile or so of a small river before it enters the sea. In the USA a "creek" can be hundreds of miles inland. In Britain pedestrians walk on the "pavement" ("sidewalk" in USA) but in the USA cars and trucks drive on the "pavement". Etc, etc.
There are many differences in the useage of English in English-speaking communities across the world (South Africa, other countries in Africa, Australia, The West Indies [Caribbean], etc, etc). Some linguistic scholars now refer to "Englishes", noting the huge differences in usage.
Being British , I could be unkind and refer to all USA usages as "dialect". But then I would have to make reference to all the various (dozen or more) dialects in use in the British Isles, some of which use words and sentence constructions unknown to many other Britons.