Original work or translation?
A book published in Polish may have been written in that language or translated from another. Check the author, translator and publisher for the edition you are choosing. Different translations can vary in voice and approach.
What the search verifies
Language filtering uses the published-language information returned by Amazon for each edition. It does not infer language from a title, a cover or the country of the store. Books without matching language information are omitted from that filtered page.
Read a sample first
Use Amazon’s Kindle sample, where available, to assess the prose and reading difficulty. A general fiction listing does not establish a language-learning level. Confirm compatibility and purchasing eligibility for your account.