I have no idea how you measure fluency, but most of the population we are concerned with learned a foreign language until the age of 16. Brits are "famously monolingual" because the country only speaks one language (unlike almost every other European country).
I don't know, I haven't tried to talk to any of them in a language that isn't English. Again, your supposition that this must be true is based on what? It must be...you heard this thing about Brits...
Right and two of the people you mention have never served in British parliament. Hannan has links to the US...and is the same person advocating heavily for a Swiss deal with EU...that couldn't be right though? You said he had "links". He wasn't the Brexit Trade Minister (that is a fictional position).
Truss and Kwarteng didn't look "strongly" to the US...I have no idea where this is coming from. Do you just not like the US so you think this other group of people you don't like must be allied to them? Truss was Trade Minister and did deals with the Commonwealth, there was no real focus on the US at all (because of Biden). Britannia Unchained is famous in the UK for being particularly adulatory towards East Asia, not the US.