It is not forbidden to have multiple accounts. However, we cannot offer official support for multiple accounts as the game is designed to be played with only one account per person.
We cannot provide support for accounts lost due to trying to use multiple accounts.
Please note that Game Center and Google Play only supports one game per account.
Trying to save multiple games to same account will result in lost data and is against our Terms of Service.
"You shall not share the account or login information (user ID), nor let anyone else access your account or do anything else that might jeopardize the security of your account. You are solely responsible for anything that happens through your account, including all uses of the login information and purchases made, whether or not authorized by you."