There are several ways to translate a PDF document freely, without having to spend money on expensive software or services. One way is to use Adobe Acrobat, which allows you to export your PDF document into an editable format, such as Microsoft Word or Text, and then use an online translator to translate the document. Another option is to use an online PDF translator, such as Smallpdf or Canva Translate, which allows you to upload your PDF document and translate it into various languages for free.
Another option is to use Google Translate, which can translate PDF documents into various languages. You can upload your PDF document to Google Translate and download the translated version. Additionally, you can use DocTranslator, a free online application that uses Google Translate to translate your documents.
It's also worth mentioning that some PDF editors, such as Adobe Acrobat, have built-in translation tools that allow you to translate PDF documents without having to use any additional software or services.
In summary, there are several ways to translate a PDF document freely, and the best option for you will depend on your specific needs and preferences.