Welsh and Scouse are the British accents that Amazon Alexa and Google Assistant struggle to understand the most, a study has found.
In contrast, smart speaker users from London and Lincoln rarely have any problems controlling the devices, a study by UK price comparison site Uswitch found.
Artificial Intelligence-powered speakers are estimated to now be in over 5.8 million homes across the United Kingdom.
However, researchers have warned that the smart devices are left flummoxed by more than 23 per cent of regional dialects.
'Smart speakers are becoming an integral part of many modern-day homes. While most of us find them useful it's clear that more needs to be done to make voice recognition features smoother,' said Uswitch.com broadband expert Nick Baker.
'The use of artificial intelligence in products is only going to increase and as it grows in popularity it's important that features are accessible to all.'
'The more we use virtual assistants the better they will get at understanding us.'
'Some brands are already taking steps to allow assistants to learn about our accents which should avoid alienating customers and improve user experience.' In their study, the team asked participants in 309 locations across the UK — representing some 30 different accents — to record themselves give their Alexa or Google Assistant ten commonly-used commands.
These included 'What is the weather like today?', 'Please can you turn off the lights?' and 'Play the next song, please'.
The researchers then graded each video on a scale of 1–10 based on whether the smart speaker was able to understand its owner's accent or not.
Finally, Google data was used to assess where in the country people were searching for information about being understood or not understood by their smart devices — which was factored in to give an overall score.
The findings suggest that Welsh is the hardest accent for smart devices to comprehend — with Cardiff receiving the worst voice clarity score and racking up 1,550 Google searches a month for "Why doesn't Alexa understand me?".
Other cities where Alexa and Google Assistant struggled were Glasgow, Liverpool, Birmingham and Belfast.
Scousers would appear to be the most bothered by being misunderstood — making some 1,700 searches a month for 'Why doesn’t my smart speaker understand me?'
The full findings of the study were published on the Uswitch website.