Interesting concept that I wasn’t familiar with. But for anyone else googling it, the concept is a spectrum of high vs low ‘context’ (not ‘content’) culture/language.
As in the commonly discused example of saying "no": High content language speakers say no by giving an explanation of why fulfilling the request would be difficult (a relatively large amount information is transmitted) which, to their surprise, is taken as a yes by the low content speaker.
And adapting to this is difficult, because high content speakers prefer their information, while low content speakers feel inundated and prefer their simplicity.