There is no 'standard English'. English by its very nature is divided into American, British, Australian, New Zealander, Canadian, South African, Irish...and so on. Of course, we share a common grammar and most of our vocabulary, but you can never account for the number of dialects we have.

British linguists distinguish dialect from accent, which refers only to pronunciation. Thus, any educated English speaker can use the vocabulary and grammar of Standard English, but different speakers use their own local words for everyday objects or actions, regional accent, or Received Pronunciation, which within the U.K. is considered an accent distinguished by class rather than by region. American linguists, however, include pronunciation differences as part of the definition of regional or social dialects. The combination of differences in pronunciation and use of local words may make some English dialects almost unintelligible to speakers from other regions. The major native dialects of English are often divided by linguists into the three general categories of the British Isles dialects, those of North America and those of Australasia. so it depends