Well, you initially mentioned just him speaking fluent German here - but as far as your elaboration above I'm not sure George III, George IV, or William IV were raised to be German as opposed to British, so far as there was a sharp difference for royalty anyway.
They were raised bilingual and bicultural, like a lot of children of immigrants.
Do you think it's wrong to say James II would not have taken it nearly as well? Not as badly as William the Conqueror, but he strikes me as someone who was more stiff about his dignity as far as "I am the king" than Charles II.
James VII & II had very legitimate reasons to be sceptical of people who were addressing him as if he weren't the king - even before he ascended, they tried to deny him his rightful throne because of religious bigotry, his first year on the throne, one of his nephews almost overthrew him, then three years later, a different nephew succeeded in overthrowing him. Shame William of didn't lose and and get the Monmouth treatment.
When someone came up to James II asking to be touched for scrofula, he retorted "God grant you better health and more sense" and refused.
To be fair, I wouldn't want to touch someone with a contagious disease, especially in a time before there was real medical care.
Every British royal since George I has spoken German. It was the language at home under Victoria, with one observer noting that, even in later life, her children's German accents got progressively thicker the longer they were in one another's company.
I wonder to what extent they addressed each other as Jürgen/Wilhelm/Viktoria/Eduard/Albrecht in private. I doubt Charles and Andrew were ever called Karl/Carl or Andreas, though. Prince Harry = Heinrich von Oldenburg lol, or, in full, Heinrich Carl Albrecht David von Oldenburg.
As to George V, he spoke fluent German - why wouldn't he? -
I remember reading somewhere that his English was far better than his German. I studied German for half a decade, but I would not say that I can speak German. I can have a basic/possibly intermediate conversation chock full of grammatical errors and anglicisms, with a very strong English accent (even though I am Irish, my native language is, sadly, English, so I think it's proper to call my accent in German English, since it's not an accent that comes from the Irish language). I can read and understand bits and pieces, just for example
de.wikipedia.org
This is a topic I already know about, so let's se how much I can make out. Comments [in brackets] are not from the text, they are my notes on it.
"Anne war die zweite Tochter von James, dem Duke of York und späteren
Jakob II. Ihre Mutter war Lady
Anne Hyde, Tochter von
Edward Hyde, einem einflussreichen englischen Politiker. Ihr Onkel herrschte als
Karl II.
Anne und Maria waren die einzigen Kinder ihrer Eltern, die bis ins Erwachsenenalter überlebten. Anne litt allerdings an einer Augenkrankheit, so dass man sie bereits als Kleinkind nach Frankreich sandte, um sie dort medizinisch behandeln zu lassen. Sie lebte dort anfangs bei ihrer Großmutter, der Königin
Henrietta Maria, und anschließend bei ihrer Tante
Henrietta Anne, der Herzogin von Orléans.
1670 kehrte Anne aus Frankreich nach England zurück. Ungefähr im Jahre 1673 lernte sie Sarah Jennings, später Churchill, kennen, die als junges Mädchen in den Hofstaat der zweiten Frau des Duke of York,
Maria Beatrice von Modena, aufgenommen worden war. Trotz des Altersunterschiedes von fünf Jahren schlossen die zwei Mädchen eine enge Freundschaft, die über viele Jahre andauern sollte und die dazu führte, dass
Sarah Churchill zur einflussreichsten Beraterin der späteren englischen Königin wurde."
My translation, without using any dictionaries or translation tools.
"Anne was the second daughter of James, then Duke of York, later James II [THIS IS INCORRECT, IT SHOULD SAY JAMES VII & II]. Her mother was Lady Anne Hyde, daughter of Edward Hyde, a [?????] English politician. Her uncle was Charles II.
Anne and Mary [her sister, who usurpsed their father along with her cousin/husband William of Orange] were the only children of their parents, [I think this next part means that survived to adulthood, based on what I already know about James VII & II's children, but this is an educated guess based on my preexisting knowledge], so that when they were young children they were sent to France. They lived with their grandmother, Queen Henrietta Maria [wife of the murdered Charles I], and then with their aunt Henrietta Anne, the Duchess of Orleans.
In 1670, Anne returned to England from France. In the year 1673, she met Sarah Jennings, later Churchill, a young woman who worked for the second husband of the Duke of York, Mary of Modena. For the next five years, the two girls became friends, and for many years afterwords, Sarah Churchill was friends with the English Queen."
So I got the general gist of it, but I wouldn't say that I speak German, or that I am comfortable reading it. If it were an article on a topic that I had no familiarity with and wasn't full of personal names that I recognized, I would have a much lower rate of comprehension.
and Edward VIII certainly wasn't speaking English to Hitler.
I just kinda assumed that they used translators.
In fact, at one point in his education, he was criticized because he spoke better German than he did English. All of George V's sons were fluent to greater or lesser degrees (see George VI's famous stutter), and the late Queen did speak German despite being raised in the staunchly anti-German interwar Era (although I have no clue how fluent she was in conversational German)
I remember reading that George VI didn't speak German, that he had a heard enough time with English (due to his stutter), that they didn't bother with him learning German. I don't think Elizabeth II spoke German, everything I've read says she spoke English and French. Charles III speaks German, albeit with a British accent. Prince Philip spoke it perfectly, and I think it might have been his first language. I assumed Charles learned it from Philip. Philip also spoke French well.
Thanks for the video of Edward speaking German, very cool. I noticed an English accent on some words, but he seemed pretty fluent.