are there other currencies issued?
Yes, Liberty Dollar.
Currencies of Puerto Rico
 On July 10, 2005, Liberty Dollar of Puerto Rico was created by Alfredo Pacheco Martínez. Silver ounces began circulating on October 8, 2005, marking the first time that a silver coin was distributed in more than a century.
what type of money do they use in puerto rico It was granted the use of both foreign and provincial currencies.
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Currencies of Puerto Rico [SEP] Other issued currency
In 2005, the Puerto Rican Nationalist Party issued a limited amount of banknotes commemorating the Jayuya Uprising. The series included pesos of six denominations, including $1, $5, $10, $20, $50 and $100 bills. The designs of all banknotes feature Pedro Albizu Campos in the front side while the reverses are adorned with the flags of Puerto Rico, Jayuya and the Nationalist Party. Microprint with the names of Pedro Albizu Campos and Filiberto Ojeda Ríos are found throughout the pesos. On July 10, 2005, Liberty Dollar of Puerto Rico was created by Alfredo Pacheco Martínez. Silver ounces began circulating on October 8, 2005, marking the first time that a silver coin was distributed in more than a century.