Texts can be changed using the Loco translate plugin https://xstore.helpscoutdocs.com/article/30-base-theme-translation
(the plugin does not oblige you to translate everything, but helps in text changes and can be deleted after saving the necessary edits).
If this is not what you are looking for, describe your request in more detail.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.