The project was spawned by Microsoft Australia which last year drew up its own dictionary to reflect particular Australian slang.

Microsoft UK was keen to bring the project to Britain, which is home to hundreds of regional dialects and words unique to specific areas.

Pass the stotty cake

"It's the diversity of Britain's dialects that has led us to develop the new dictionaries. So in future, your Microsoft Outlook will be able to recognise e-mails where you ask your 'marra' to get you a 'buttie' instead of inserting red lines beneath all the unfamiliar words," said Microsoft Office 2007 product manager Darren Strange.

"We wanted to give everyone the chance to adapt and personalise their software, and at the same time recognise the diversity of dialects we use here in the UK that makes us completely different to any other country in the world."

Microsoft is now in the process of sifting through the thousands of responses with a view to compiling dictionaries specific to certain areas.

Microsoft is being helped in its task by the British Library.

Jonathan Robinson, curator of English accents and dialects at The British Library said: "Britain has a rich heritage of different accents and dialects and, contrary to popular opinion, there is still a great deal of lexical diversity across the UK - where else would you find the words 'cob', 'batch', 'bun', 'barm cake', 'stotty cake', 'scuffler' and 'bread cake', all meaning bread roll?"

Some areas such as Devon, Yorkshire and Lancashire have been well represented in the project while others, such as Cambridge, have so far elicited few entries, according to Alison Boswell, who is working on the project.

Microsoft has extended its original end-of-May deadline, giving people one extra week to submit words, said Ms Boswell.

Those wishing to contribute should send their entries to dialect@microsoft.