Pascal would be the god of sages and academia. His clerics would know a lot of spells but be unable to actually cast any.
Java would be an uncountable horde of trickster demons. They're everywhere and you can't avoid them, and they're always looking for ways to trip you up.
Assembly would be Ilúvatar himself, the all-powerful overgod who rarely gets directly involved in anything. Only obsessed lunatics know how to call upon him for aid.
Python would be the god of hearths and smiths, the one that gets a lot of menial, unglamorous stuff done.
COBOL would be the demon of accountants, money, and ancient knowledge. You will have to deal with him eventually.
Flash would be the demon of quick and seductive power. Flash will do whatever you want, right away, but she will exact a heavy price.