Change logo on Serbian version of Wiktionary, the file has been made and uploaded to Commons: https://commons.wikimedia.org/wiki/File:WiktionarySr_-_DP_Derivative.svg (needs to be protected, as well as English original file which is still unprotected)
You can compare SVG source code of English original and file I created (SVGs are actually not easily comparable becuse my file is less than 50% in size i.e. because I created it using "Save as" in Adobe Illustrator so SVG source got recreated and messed up relatively to original), and you can also visually compare current sr.wikiquote logo and file I created – as well as en.wikiquote logo and file I created.
Note: Current, old sr.wikiquote logo has a spelling mistake, yeah – it is dictionary and has spelling error in its logo (вишејезична literally means 'multitongual' [with n it is referring to the tongue as an organ, and with k to the language], I corrected it in new version to вишејезичка which means multilingual); this is not a big mistake because Russian for example – as akin to Serbian – uses многоязычный, and Croatian also – uses adjective višejezična, Macedonian also – uses adjective повеќејазични etc.