Keyboards can't be moved to the SD card as far as I know.
On my device ZDBox informs that Swiftkey is in SD card, with 19,42MB being used, but at popup menu, "Mais Informações" (more information), the app manager is called and I can see "Mover para cartão SD" (move to SD card) button enabled.
At the app manager the following informations are obtained:
Storage:
Total: 26,38MB
App: 19,34MB
Data: 84,00KB
SD Card: 6,96MB
After I clicked (a moment ago) on "Move to SD Card" button, information seems now inconsistent: App size changed for 5,09MB and SD card still with 6,96MB. Total remains 26,38MB. Swiftkey no longer works and are unavailable among the input methods.
So it seems in fact now Swiftkey is in SD Card, but there is a lot of free memory, then I don't sure if this is a good choice. Anyway Swiftkey remains fast here, even after moving it to SD Card.
nov 09 was the best CM10 build for Swiftkey on my device, undoubtedly.
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After some time my phone is experiencing lags, launcher gets slow and I have to reboot it. This must be a bug and it has occurred on others builds too.