Siri, Apple’s AI personal assistant, could be poised to make her debut on Apple’s next iPad. At least, that’s what the folks at SlashGear are reading into a software update that also makes it impossible for hackers to install Siri on an unofficial device, which right now means anything but the iPhone 4S.

The new update, the blog speculated, could be to enable the iPad 3 to use Siri as well. It would be no surprise if Apple incorporated its personal assistant in its next tablet given how well the feature has taken off on the iPhone 4S. The software is far from perfect — ask anyone with an unconventional accent — but is a great add to the latest iPhone and is certainly a pop culture hit. And since Siri is one of the rare products that Apple has released in beta, it’s likely to keep improving.

One of the newest features from Siri may have been leaked by the program itself. Starting yesterday, users who ask the program what languages it speaks noticed a new addition to the list of English, German and French. Siri says that it now speaks Japanese as well, though the new language isn’t reflected in its settings. Apple has said that support for Japanese, Chinese, Korean, Italian, and Spanish is coming in 2012, so it wouldn’t be a surprise to see Siri get a little smarter.

Siri does have one language barrier that could be hard to overcome on any device, if she is going to add Japanese to her resume: her name is the same as the Japanese word for posterior.

Cue the quiet giggling. . .now.

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