Is there a standard way in English to identify the husband and wife in a joint divorce petition?

Question

I'm helping someone translate a document from German to English; in German the word "petitioner" has both a masculine and a feminine form and that word is used often in the document.
(So, the petitioner (male) will do this; the petitioner (female) will do that.)

Answer 1

Though I dont have legal or law related background. But as per my knowledge, in the legal or court documents, in the beginning its defined like Mr.abc (hereinafter called as 'petitioner 1') and Mrs, xyz(hereinafter called as 'petitioner 2).