Question: Are both Ursula K. Le Guin and Richard Aldington both American authors?

Context articles: Virginia Kidd
Richard Aldington
The Language of the Night
Ursula K. Le Guin
The Wind's Twelve Quarters
City of Illusions
Planets of the Hainish Cycle
Nine Lives (novelette)
The Word of Unbinding
Coming of Age in Karhide

Virginia Kidd (June 2, 1921 – January 11, 2003) was an American literary agent, writer and editor, who worked in particular in science fiction and related fields.
 She represented science fiction American authors such as Ursula K. Le Guin, R.A. Lafferty, Anne McCaffrey, Judith Merril, and Gene Wolfe.
 Wolfe modeled Ann Schindler, a character in his 1990 novel "Castleview", in large part on Kidd.
Richard Aldington (8 July 1892 – 27 July 1962), born Edward Godfree Aldington, was an English writer and poet.
The Language of the Night: Essays on Fantasy and Science Fiction is a collection of essays written by Ursula K. Le Guin and edited by Susan Wood.
 It was first published in 1979 and published in a revised edition in 1992.
 The essays discuss various aspects of the science fiction and fantasy genres, as well as Le Guin's own writing process.
 The 24 essay selections come from a variety of sources, including journals, book introductions, and award-acceptance speeches.
 The title comes from Le Guin's description of fantasy literature: "We like to think we live in daylight, but half the world is always dark; and fantasy, like poetry, speaks the language of the night."
Ursula Kroeber Le Guin ( ; born October 21, 1929) is an American author of novels, children's books, and short stories, mainly in the genres of fantasy and science fiction.
 She has also written poetry and essays.
 First published in the 1960s, her work has often depicted futuristic or imaginary alternative worlds in politics, the natural environment, gender, religion, sexuality and ethnography.
 In 2016, "The New York Times" described her as "America's greatest living science fiction writer", although she has said she would prefer to be known as an "American novelist".
The Wind's Twelve Quarters is a collection of short stories by American writer Ursula K. Le Guin, named after a line from A. E. Housman's "A Shropshire Lad" and first published by Harper & Row in 1975.
 Described by Le Guin as a retrospective, it collects 17 previously published stories, four of which were the germ of novels she was to write later: "The Word of Unbinding" and "The Rule of Names" gave Le Guin the place that was to become Earthsea; "Semley's Necklace" was first published as "Dowry of the Angyar" in 1964 and then as the Prologue of the novel "Rocannon's World" in 1966; "Winter's King" is about the inhabitants of the planet Winter, as is Le Guin's later novel "The Left Hand of Darkness".
 Most of the other stories are also connected to Le Guin's novels.
 The story "The Ones Who Walk Away from Omelas" won the Hugo Award in 1974, while "The Day Before the Revolution" won the Locus and Nebula Awards in 1975.
City of Illusions is a 1967 science fiction novel by American writer Ursula K. Le Guin.
 It is set on Earth in the distant future, and is part of her Hainish Cycle.
 "City of Illusions" lays the foundation for the Hainish cycle which is a fictional world in which the majority of Ursula K. Le Guin's science fiction novels take place.
Ursula K. Le Guin's Hainish Cycle takes place in a science fiction universe that contains a number of planets, some of which have been explored and made part of an interplanetary group called the Ekumen; others are continuously explored by the Ekumen over a time frame spanning centuries.
 Le Guin has used approximately a dozen planets as primary settings for her novels; as such they have detailed physical and cultural aspects.
 Le Guin reveals in "The Left Hand of Darkness" that there are 83 planets in the Ekumen, with Gethen a candidate for becoming the 84th.
"Nine Lives" is a 1968 science fiction novelette by Ursula K. Le Guin.
 Originally published in "Playboy" magazine (it was reprinted in "The Wind's Twelve Quarters"), the story uses human cloning to explore perceptions of self and other.
 When it was published, Le Guin opted for publishing it under her initials (U.K. Le Guin) rather than her name, as per "Playboy"'s suggestion that a female author would make its readers "nervous."
 Le Guin has said "It's not surprising that "Playboy" hadn't had its consciousness raised back then, but it is surprising to me to realize how thoughtlessly I went along with them.
 It was the first (and is the only) time I met with anything I understood as sexual prejudice, prejudice against me as a woman writer, from any editor or publisher; and it seemed so silly, so grotesque, that I failed to see that it was also important."
"The Word of Unbinding" is a short story by American writer Ursula K. Le Guin, first published in the January 1964 issue of "Fantastic", and reprinted in collections such as "The Wind's Twelve Quarters".
 In this story, the Earthsea realm, which was later made famous by "A Wizard of Earthsea", was first introduced.
 Along with the story "The Rule of Names", this story conveys Le Guin's initial concepts for the Earthsea realm, most importantly its places and physical manifestation, but not the characters appearing in the novels.
"Coming of Age in Karhide" is a science fiction short story by Ursula K. Le Guin, first published in 1995.
 The story is set on the fictional planet of Gethen, the same as Le Guin's 1969 novel "The Left Hand of Darkness", and is a part of Le Guin's Hainish cycle.
 The story explores themes of growing into adulthood on a planet where individuals have no fixed gender identity.
 Reviewers stated that the story went further than "Left Hand" in its exploration of gender and sexuality, and was a "quietly feminist" work.
 It was also described as lacking the "dizzying impact" of "Left Hand".
 In 2002, it was anthologized in the volume "The Birthday of the World", along with many other stories exploring marriage and sexual relationships.