Hello!
John is right - you can change these placeholders in the back end.
Go to "Store setup" -> "Translations", search for the following labels and edit them:
- Your first name
- Your last name
- 1000 Example street
- Example city
- Your state
- 90001
- +12130000000
-
email@example.com
If for some reasons the back end says there is no label, add it manually with the desired "translation".
Does this help?