While playing the Abbasid Dynasty, if you select an infantry unit (Spearman, Man-at-Arms, Archer, Crossbowman, or Handcannoneer) and press Y to access the secondary UI panel, only the Battering Ram and Siege Tower have hotkeys; the Springald and Mangonel do not. See this link to see screenshots: Imgur Link
Also, when putting your mouse over a stable (for a French player at least), it says that the building increases maximum population (as if it were a house).
