'Inform' is nice and simple
'Envision' is virtually unknown in British use but it's the standard American word.
The other two - either way.

'Gardez l'eau' may be a popular etymology like 'Port Out Starboard Home'.

I know, Jasper. This forum needs an 'edit'.

Most terms in 'polite' use are euphemisms - restroom, bathroom, public conveniences, lavatory, toilet - even latrine, which is also to do with washing. Other people's euphemisms always seem more ludicrous than one's own.
'Loo', I think, is an attempt at humour based on 'Waterloo'.

Will - I would not presume to cast doubt on your learning, which is evident. Perhaps it's simply that some of us are slower than others to accept change. The reasons for that are too various to be pinned down.
By the way - Happy Christmas.

Of course many Brits use 'different to'. I hear them doing so. But for my generation it's a solecism.
I am forever starting sentences with a conjunction, Will, solecism or not. Nobody's perfect...

'Different to' is still avoided by educated Britons. The fact that it's used on the B.B.C. doesn't surprise me.

I have never in my life heard 'pled' being used by a Brit. It's not wrong - it's just not British English.
Yes - I just got a squiggly line.

Okay, objective....

Prepositions take the accusative..