Why is this a problem?
Conversational awkwardness at the least. At worst, fear of asking questions leads to lack of knowledge transfer. And absence of knowledge leads to poor decision-making and mistakes.
Only engage with people with the same knowledge base. This is almost impossible to achieve, and undesirable due to the cross-fertilisation value of multi-disciplinary interaction.
Greater cultural acceptance of diverse knowledge bases, possibly driven by explicit education on the matter in the formal education system.