I would like to preface this by saying I'm Australian and speak with an Australian accent when I'm speaking English which can be hard to digest for a lot of people new to Australia.
A lot of 1st gen Chinese-Australians struggle with my accent so I commonly find it easier to order in Chinese. This is how I would normally transition between the two languages:
I feel that this is kind of a harsh transition but haven't been corrected; yet. I've considered saying something like: 我们可以说汉语吗 but it doesn't sound overly natural or correct.
How would I politely ask to continue the conversation in Chinese?