Speers says that he spent the first few years of his son's life speaking to him in the invented language of the alien race featured in the series "Star Trek" in order to better understand how children learn languages. Meanwhile, Speers' wife continued to address the child in English.
He told the Minnesota Daily,
I was interested in the question of whether my son, going through his first language acquisition process, would acquire it like any human language. [...] He was definitely starting to learn it.
Wired reported on Speers' language experiment in a 1999 article in which Speers described the challenge of speaking to his infant son given that the Klingon alphabet lacked words such as "diaper" and "bottle."
The article notes,
So Speers found himself using "thing which is flat" for table. "Alec very rarely spoke back to me in Klingon, although when he did, his pronunciation was excellent and he never confused English words with Klingon words," Speers says.
Eventually, Speers gave up on Klingon communication, saying that his son "stopped listening to me when I spoke in Klingon" and "it was clear that he didn't enjoy it, and I didn't want to make it into a problem."
His son, now in high school, doesn't speak a word of Klingon, according to the Minnesota Daily.
Despite his interest in Klingon, Speers says he's not a Star Trek fanatic.
I don't go to 'Star Trek' conventions, I don't wear the fake forehead. [...] I'm a linguist.Well thanks for ruining the story d'Armond, you know we all wanted to see you dragging your kid around Star Trek conventions both speaking in Klingon in full Klingon regalia.