Best language for this?

I'm thinking of making a kind of simulation game. A kind of cross between Dwarf Fortress and the Sims. But a bit simpler.

i.e. it will do things like simulate births over several generations to give the characters family history and relations.

I'm trying to think what language to use. I want it to be downloadable on PC, because I imagine this is the kind of thing PC gamers like. But I would also like the option of having it portable to mobile or tablets.

First I thought of C# and Unity or...

Best language for this?