The French word for “roller coaster” is “montagnes russes” or “Russian mountains.” Since the origin of roller coasters, inventors have been improving the early designs that came from Russia to create astonishing amusement park thrill rides.
Research:

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National Roller Coaster Museum and Archives. “History of the Roller Coaster.” 2013. https://rollercoastermuseum.org//wp-content/uploads/2017/11/History_Timeline.pdf
American Experience. “A Century of Screams: The History of the Roller Coaster.” https://www.pbs.org/wgbh/americanexperience/features/coney-century-screams/
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Lallensack, Rachel. “14 Fun Facts About Roller Coasters.” Smithsonian. 8/16/2019. https://www.smithsonianmag.com/innovation/14-fun-facts-about-roller-coasters-180972920/
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Haynes, Christine. “The Battle of the Mountains.” Historical Reflections / Réflexions Historiques, Winter 2018, Vol. 44, No. 3 (Winter 2018). Via JSTOR. https://www.jstor.org/stable/10.2307/48581519
Yoon, Richard. “The rise and fall and rise of the amusement park.” International Theme & Amusement Park Journal Vol. 2. No. 4. (2021).
Mental Floss. “The Roller Coaster's Thrilling History.” 12/16/2022. https://www.youtube.com/watch?v=BHUAlzwG0r4
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Princeton Graphic Arts Collection. “First Roller Coaster.” https://graphicarts.princeton.edu/2018/05/18/first-roller-coaster/
King, John Glen. “A Letter to the Bishop of Durham, containing some Observations on the Climate of Russia, and the Northern Countries, with a View of the Flying Mountains at Zarsko Sello, near St. Petersburg.” 1780. https://books.google.com/books?id=SB2OxgEACAAJ
Louis Post Dispatch. St. Louis, Missouri · Saturday, September 29, 1883 https://www.newspapers.com/image/137793104
“Roller Coasting.” Chicago Tribune. Chicago, Illinois · Sunday, September 30, 1883 https://www.newspapers.com/image/349812486
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