How can I change the translation of a specific document or file?

Go the Translation overrider file

Enter the document name to be changed in the Id, and enter the Arabic and English names of this Id

In a new line, enter the same document name followed by (s) letter, and enter the Arabic and English name for the plural name of the document to be translated.

Save the record and Reload the translations.

You can know the document name to be translated from the link of this document.

For example, the sales  invoice name will be the SalesInvoice word in the part     “/0&entity/SalesInvoice&page”