Make the following text simpler
Existing dollar units today are the Bahamian dollar, the Barbados dollar, the Belize dollar, the Bermuda dollar, the Brunei dollar, the Canadian dollar, the East Caribbean dollar, the Guyanese dollar, the Hong Kong dollar, the New Taiwan dollar, the Singapore dollar, the Trinidad and Tobago dollar, and the United States dollar.
A dollar is a type of currency. Many countries have named their money the dollar, so in an encyclopedia article it is important to say which country the dollar is from that is being talked about, for example, the United States dollar or the Canadian dollar.