Many thanks for the insight. Appreciated.
Your mention of switching languages reminds me of something here. I was in a bar in rural Wales. There were two couples chatting at the next table and they seemed to move seamlessly between Welsh and English. The conversation was about nothing of consequence that might have “required” a change - just the sort of usual chitchat between friends - but there must have been something that triggered a change with one person and everyone else just carried on, before the next change.
