Gdtyjr

I am writing my phd thesis in Albanian language. And I am encountering some issues with citations into the text.
I would like to replace Levinsohn and Petrin (2003) into Levinsohn
dhe Petrin (2003).

do you have any suggestions?

You will need to create your own bibtex style to do this, but this need not be as painful as it sounds. Indeed, here is a post which does some simple customization, and we'll use that as a template here: How to suppress some fields in abbrv.bst

You haven't specified which bibliographystyle you want to use. I'll work with abbrv here, but the same principal applies to others.

1. Make a copy of abbrv.bst somewhere that TeX will be able to find it (e.g. the same folder as your .tex file if you don't want to play with texmf trees), and name it something like abbrv-alb.bst. [You can find abbrv.bst in your tex installation, or you can download it from here: https://ctan.org/tex-archive/biblio/bibtex/base?lang=en ]


2. Open abbrv-alb.bst in a plain text editor, and find the following piece of code:

FUNCTION format.names
 's :=
 #1 'nameptr :=
 s num.names$ 'numnames :=
 numnames 'namesleft :=
 namesleft #0 > 
 s nameptr "f.~vv~ll, jj" format.name$ 't :=
 nameptr #1 >
 namesleft #1 >
 ", " * t * 
 numnames #2 >
 "," * 
 'skip$
 if$
 t "others" =
 " et~al." * 
 " and " * t * 
 if$
 
 if$
 
 't
 if$
 nameptr #1 + 'nameptr :=
 namesleft #1 - 'namesleft :=
 
 while$

3. Replace the line " and " * t * with (in your case) " dhe " * t * . Save the .bst file and close it.




4. In your .tex file, be sure to replace bibliographystyleabbrv with bibliographystyleabbrv-alb, before re-compiling with latex, bibtex, latex, latex.