Yes, I have thought about that, quite a bit, in fact, because lol is totally obsessed with the English language, knows barely anything about it, and wants to understand English as badly as half of the weeaboos on sites like this want to know Japanese. You would know this if you had seen anything that he has posted outside of .flow updates.
Considering lol's obsession with English, the speculation that Smile may be an author-avatar character, and the fact that "wwww" plays when you interact with Smile, it doesn't surprise me in the least that the audio clip would be full of Engrish.
lol uses machine translation constantly to communicate with English-speaking fans. It wouldn't surprise me at all if he had typed a sentence into Google translate, translated it into English, listened to the audio playback, and recorded himself imitating it (terribly) to use as a voice for Smile.