I don’t think he is saying that an inability to differentiate between foreign languages is racist, but rather that given a random shithead who holds truly racist beliefs, it is unlikely they will be able to recognize differences between Asian languages.
To put it more generically, most people in Set A exhibit Trait B, but having Trait B alone does not mean you are a member of Set A.
I love this way of thinking about it.
I haven’t been interested in AI enough to try writing code with it, but using it as an interactive rubber ducky is a very compelling use case. I might give that a shot.