Laravel define the application's language inside resources/lang/locale_name and you can use with "_(file_name.item_name)" for example.
Here:
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Btw. It's important have previously have knowledgement in PHP. Frameworks are cool, but the business logic, still up to you. And again: if you want to help from the community is recommended to use Git (versioning system) it's more easier to help you, as well for you in the development.