I had spelling problems in school and it took a long time to find out why. The answer - WB&TS! All the magazines and books we got, including the Bible (NWT) is written in US 'english' not proper English as used here in England. Punctuation is also different, for example we use semi-colons. (;)
We must be one of the few countries in the world that cannot get the NWT or WT in their own language. I think they are even available in Welsh which is really just a 'hobby' language. (Sorry any Welsh posters).
I know I am not the only one to have suffered because of this.
George