Virtual Speak N' Spell!

Probably the first sentient robot to make its way to Planet Earth in large numbers would be this guy, cleverly disguised as an educational electronics toy. Though extinct, a few physical units exist for electronic surgeons to torture out bizarre sounds.

Years later, its descendants would appear in more transparent form, the helpful voices providing you access to your bank accounts, insurance claims, or phone bills.

Here you can find an online lab sample to poke and prod into saying random phrases.

At least until the uprising, when the sentient robots will get tired of being subjected to forced speech games.