dialects

I've been recording the audio for a puppet sketch and was amazed to find,when it was played back,that I didn't recognise my voice at all.I've developed a Derbyshire accent after living here for 14 yrs.I had no idea and no-one has ever pointed it out to me.This got me thinking about the way our English language is altering and how many words are now being included in the dictionary.On a visit to Essex I was intrigued by the word 'sammink' and someone had to explain that it means 'something' There was a noticeable absence of 'th';it being replaced by 'v'and I wonder if this will be the accepted spelling in a hundred years.I hasten to say that this not a criticism but an observation.If I'm still around in a hundred years I'll let you know.