Furthermore, “amphitheatre” (ἀμφιθέατρον) is written with a ph, not a p; please correct.

In rP23160#39548, @Nescio wrote:

Furthermore, “amphitheatre” (ἀμφιθέατρον) is written with a ph, not a p; please correct.

not with a "pi" pls keep serious

It's possible to upgrade existing defense towers to bolt towers, however, it is not possible to build them directly. Because the AI never upgrades anything, this gives an unfair advantage to human players. Besides, not all factions have them, further affecting gameplay balance.
Therefore I think it's better to remove these upgrades; keep these towers for mods and scenarios, but don't make them available by default, at least not until proper discussion and gameplay testing; cf. practice ranges and stables added last year.

The concern by minohaka was fixed in rP23161.

The warning that appears everytime one opens the structree and select Cart or Ptol was fixed in rP23328.

WARNING: The "structures/cart_tower_bolt" template has a defined civ of "spart". This does not match the currently selected civ "cart". WARNING: The "structures/ptol_tower_bolt" template has a defined civ of "spart". This does not match the currently selected civ "ptol".

Since the fix was very easy and the warning very blatant and repetitive, I don't understand why it hadn't been fixed, but I guess that's how it is.