I'm not a linguist, but typically words evolve as memes and/or follow etymological patterns made up of root words. It's very rare that they're plausible sounding gibberish attached to plausible arbitrary meanings. This generator seems like it's in the "uncanny valley".... They're all somewhat plausible immitations of words, but the fact that they're not natural can be felt.
>>yosito+(OP)
Totally agree with all of that. It's probably a matter of outlook; I expect and enjoy some weird uncanny valleying from a humorous ML generator.