I used a dictionary and read up on declensions but since I have zero knowledge on the language, I have no idea if I translated them correctly (most likely not). I was hoping someone could provide corrections and explain them to me. Thank you so much in advance!
The sentences I'm trying to translate are:
1) An idle mind is the devil's workshop.
2) Idle minds are the devil's workshop.
I used the singular genitive for diabolus on both to indicate possession, the nominative (singular and plural) for mens since they're the object of the verb sum, nominative for inane and officina. Here are my attempts:
i) Mens inanis officina diaboli est.
ii) Inanes mentes officina diaboli sunt.