Unfortunately not (only)

Not only, but the opioid crisis (https://en.wikipedia.org/wiki/Opioid_epidemic_in_the_United_..., https://en.wikipedia.org/wiki/Opioid_epidemic_in_the_United_...) is still something pretty specific to the United States, so you can't automatically assume that developers from other countries (I'm going by the author's name here because I wasn't able to find other information about him) will be familiar with the street names of various opioids...