Abbreviations in bibliography like "n" and "pp" or words like "Volume" and "and" come from English. I'm writing my thesis Turkish and except bibliography, there is not a problem but, like the picture below, the terms in red circle remain English and I want to change it.
For example "and" -> "ve" (Turkish)
\documentclass[a4paper,12pt,fleqn]{article}
\usepackage[top=2.5 cm, bottom=2.5 cm, left=3 cm, right=3 cm]{geometry}
\usepackage[backend=biber, sorting=none]{biblatex}
\bibliography{dnm}
\usepackage[turkish,shorthands=:!]{babel}
\begin{document}
Hello Word \cite{pdf_1}.
\selectlanguage{turkish}
\printbibliography
\end{document}

biblatexdoes not currently support Turkish. If you are keen, you could work on a translation; https://github.com/plk/biblatex/wiki/Checklist-for-submitting-a-new-localisation-file-(.lbx) – David Purton May 05 '19 at 13:44fontencpackage with the optionT1. – Mico May 05 '19 at 13:53