The Citoid mediawiki extension has a credit line (Powered by...") which will display either "Powered by Zotero" or "Powered by Wayback Machine."
"Powered by" is translatable, but "Zotero" and "Wayback Machine" are not.
These should be internationalised by adding new messages to qqq.json and en.json files in the i18n subdirectory and making the relevant changes to /ve/modules/ve.ui.CitoidInspector.js to pull in the messages.
You don't need to modify the other i18n files, but qqq.json is for notes/info; you might comment that although Zotero and Wayback Machine are both proper names and don't need to be translated in many Latin languages, they might need to be transliterated in some languages that use different character sets (i.e. Arabic, Russian, etc.)
See also Manual:Developing_extensions#Localisation for more on how to make messages translatable.
In order to test it is working, you will need to set up mediawiki and the Citoid extension using Docker.
You will also need to add citation templates and configure citoid in your local installation, following the directions here.