How to change the wording of the workflow? For example how to change/customize the wording of the options in the user site, such as forgot my password, manage my password, my questions and answers profile, etc....
Regarding how to change the wording of the self-service workflow, you can change the wording for each workflow from within:
QPMAdmin site | home tab | management policy | self-service workflows
Select the workflow you want to change the wording for -> Select workflow settings | change workflow name. (see screen shot attached)