Australian English
Subtle changes on an individual level include how the letter 'a' sounds like in the words castle, dance, chance, advance, etc.  Some use the vowel in calm others use the vowel in mat or mad. Another regional difference is the pronunciation of 'e' sounds especially followed by 'l', such as Melbourne, helped, cellist, with Victorians generally transposing the 'a' and 'e' vowel sounds in many words. For example, pronouncing an 'e' sound in words such as alchemy or chalice, yet an 'a' vowel sound for Celery.