We are entering an age when speakers of the California languages will be learning in school, or as adults, rather than at home.
Native speakers of each language learn the other language.
It could be argued that most young Gaelic speakers today learned much of their early vocabulary from the programme.
Generally, the speaker learned through means other than 4.
This is because there are relatively few elder speakers but many people are learning the language.
Pimsleur claimed this is how native speakers learn grammar as children.
This problem existed only in one direction (Dutch speakers would learn French).
When speakers of these languages are learning English, it is often difficult to explain to them what an article is.
But as soon as English speakers learned French the problem was gone.
For this reason many speakers learn the language partially, and often in a simplified way with significant influence from the majority language.