Oh thats very nice- in what way -do you have family over here then. . A lot of spelling of the english language are different between UK & US.
for example - U.S ( CENTER)....... UK (CENTRE)
given we pronounce it the way americans spell it - then you as a american & citizen & a representative of America - spell it correctly - the UK actually spell it wrong. The same for US (THEATER).. ..... UK (THEATRE)
spellings like neighbour/neighbor, color/colour are neutral the spellings are neither correct or incorrect - its how each country chooses how to spell it favourite/favorite is another example