Siri might already speak in English, but if you want to really freak people out or just have some fun, why don’t you make your humble virtual iPhone assistant speak in accents? This tweak can make it easier for users to communicate with Siri. You can download it by loading up ModMyi repository, which happens to be one of the default three in Cydia. So of course the device must be jailbroken. With over 40 accents, it is impossible to get bored.