For years, people have tried to adapt CI instruction to specialized language instruction, for example to train a group of foreign nurses who need the medical vocabulary before they can start working in the profession. It is impossible.
The nurses will not learn the terms they need until the bedrock of their language system is more established in a general way. The medical terminology cannot be learned unless the overall language system itself in each nurse is strong.
It’s like trying to put cargo on an unfinished boat – it will sink. It’s like building a stadium for a soccer game but forgetting to put in the field. The nurses will only learn the vocabulary they need when the field is finished.