First of all: Thank you for your work so far! I like the idea of playing Horizon with Star Trek ships and factions
When I tried your mod I was wondering about it and at first I didn't know why. But then the idea got clear in my head and I think I know now. While you obviously chose races from TOS, there are some ship designs from TNG. For my feeling this crashes. Having a TOS mod would be pretty unique as most ST mods I've seen for video games take on the 24th century of ST. So I suggest to split this mod into two: One TOS and one TNG. Being a TOS mod would give an argument why you made the Romulans on base of the Tantik while I think the most Tantik-like faction in ST are the Borg.
Please take this as nicely ment feedback. I would discuss species and species traits if you like to (don't know if it is possible to change the traits for custom species as Romulans definetely are not parasitic).
And if you want to have a translation into German for your mod, I can do this for you. Actually I translated the mod before trying it out - if I could upload files to this forum I'd do it right now .oO( this wasn't possible here, was it? ) Unfortunately, the german empire names mess up the grammar used in Horizon as german grammar works differently from the english one.
So: Please keep working on that mod! I'd like to see a full conversion!!! Maybe I could help with simple tasks?