Question

how would you say "Ruby you shouldn't talk to this prince, he has a bad reputation" in the 1800s

Answer 1

In the style of 19th-century English, you might say:

"Ruby, you ought not to engage in conversation with this prince, for he bears a most unsavory reputation."

Answer 2

how would you say "we didn't even invite him" in the 1800s

Answer 3

In 19th-century English, you might say:

"We did not even extend an invitation to him."