some Qs in general (ERC20, contract ABI, Coinomi)

[@cryp2night]

1. Does MEW auto-recognize ERC20 token like cataloniacash?
2. I use Coinomi, they ask for contrcat ABI when i set up wallet, why does ANNs never include these important info?
3. How do i retrieve "contract abi"in general?
4. How do i receive the contract ABI for CataloniaCash?
5. Why is this is so difficult, what do i wrong?

Thanks