accents-and-dialects: remove non-standard tags
accents-and-dialects: fix the NZE link
accents-and-dialects: correct the Scottish English tag
accents-and-dialects: add Welsh English
accents-and-dialects: remove the abbreviations
accents-and-dialects: list the 8 Vietnam regions
accents-and-dialects: list the 9 American regions
accents-and-dialects: list the 9 English regions
accents-and-dialects: add BCP 47 region codes
accents-and-dialects: Ceremonial counties of England
accents-and-dialects: named accents/dialects