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Yes, that’s it.
Technically, in medieval times, any siege engine can be called a catapult, even ballistae (because they all literally “launch projectiles over a long distance”). So, there is no contradiction in the game, but I just wanted a more accurate description of the catapult as a trebuchet in the modern sense of the word. This mod is mainly for myself.
If there are any other places in the game where the text “catapult” is displayed, please let me know.