Oh, what have I gotten myself into. Well, here's what everyone requested:
For Pandora's answer: A poisoned girl with a vampire heart. ----> Venata puella cum lamia corde.
A BIG NOTE: ( You can also use femalla, which means a young woman, girl. For vampire, you can use lamia, striga, and strige, but they don't directly mean vampire, they mean either witch bogey, evil spirit, a screech owl(which is a bad bird omen), but heres the thing, all in common mean one who eats children/ or drink their blood. Lastly, there are many words for heart. Such as pecte( means breast, heart;feeling soul), robore( means military strenght, main element, heart, might, power), and animo( means mind,spirit,intellect,and courage...)
Note: learning latin by yourself is extremely hard, no computer program can master you at it.
For Sextus Roscius' answer: The Roman Empire fell because of its numbers system.:
Romanum Imperium quod sui numerorum constitutionem cecedi.
Note( I'm not sure if I'm right, but this the closest I know, there are so many words for sytsem and fell.
For Shannon, here's what I have in mind: I hope your pregnancy goes well.---> Tuum conceptionem spero bene ivi.
Note:(I'm not sure about goes (ivi)
Oh by the way Shannon, tell me if you find the sentence not adequate.