Node's `tty.isatty` should work: https://nodejs.org/docs/v0.5.0/api/tty.html#tty.isatty
> The first four words will be a randomly generated Doge-like sentence.
The seed phrases are fully valid checksummed BIP39 seeds. They can be used with any cryptocurrency and can be imported into any BIP39 compliant wallet.
> […] However there is a slight reduction in entropy due to the introduction of the doge-isms. A doge seed has about 19.415 fewer bits of entropy than a standard BIP39 seed of equivalent length.