A search using Google for sites ending in .au, returns around 3.7 million results for barbeque and 17.3 million results for barbecue. Microsoft Word allows both barbecue and barbeque as valid spellings.
The Oxford and Macquarie dictionaries list barbecue as the primary spelling and barbeque as a secondary spelling. The Macquarie dictionary notes there’s greater use of the secondary spelling barbeque in Australia, than there is in the US or UK.
The preferred spelling in Australia is barbecue. Now there’s something to ponder whilst grilling the snags on Australia Day.
Kelvin Eldridge
www.Australian-Dictionary.com.au
The preferred Australian English spelling.