Greetings.

Interesting issue just found.

https://api.themoviedb.org/3/collection/192492?api_key=********&language=en

Returns three titles duplicated in this set, when

https://www.themoviedb.org/collection/192492-the-jack-ryan-collection?language=en-US

list just five.

Duplicates are: Patriot Games, Clear and Present Danger, and The Sum of All Fears.

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      "original_title": "Patriot Games",
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      "id": 9331,
      "original_language": "en",
      "original_title": "Clear and Present Danger",
      "overview": "CIA Analyst Jack Ryan is drawn into an illegal war fought by the US government against a Colombian drug cartel.",
      "release_date": "1994-08-03",
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      "id": 4614,
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      "original_title": "The Sum of All Fears",
      "overview": "When the president of Russia suddenly dies, a man whose politics are virtually unknown succeeds him. The change in political leaders sparks paranoia among American CIA officials, so CIA director Bill Cabot recruits a young analyst to supply insight and advice on the situation. Then the unthinkable happens: a nuclear bomb explodes in a U.S. city, and America is quick to blame the Russians.",
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      "title": "The Sum of All Fears",
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      "id": 1669,
      "original_language": "en",
      "original_title": "The Hunt for Red October",
      "overview": "A new Soviet nuclear missile sub (a Boomer) heading out on her maiden voyage that is being tracked by a Los Angeles class American submarine suddenly goes silent and \"disappears\". This focuses the attention of both U.S. Intelligence and the U.S. Navy on the Russian Sub Commander .  When it is determined that the silent Soviet Boomer may be headed for American coastal waters panic ensues. A CIA analyst, Jack Ryan,  convinces the brass that the Boomer's commander may intend something other than a nuclear first strike in mind. A perilous and tense cat-and-mouse game ensues.",
      "release_date": "1990-03-02",
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      "popularity": 12.478015,
      "title": "The Hunt for Red October",
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      "overview": "When the president of Russia suddenly dies, a man whose politics are virtually unknown succeeds him. The change in political leaders sparks paranoia among American CIA officials, so CIA director Bill Cabot recruits a young analyst to supply insight and advice on the situation. Then the unthinkable happens: a nuclear bomb explodes in a U.S. city, and America is quick to blame the Russians.",
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}