Final answer:
A plugin in this context refers to a software extension used to add translation functionality to a computer program, such as a content management system or web browser, to make content accessible in multiple languages.
Step-by-step explanation:
The term plugin usually refers to a software component that adds a specific feature to an existing computer program. When a program supports plugins, it enables customization. In the context of translating knowledge articles, a plugin could be a software extension or add-on that can translate text from one language to another within a content management system or browser.
Plugins might be required for various purposes, such as content management systems or web browsers in order to provide translation functionality. This is especially useful when dealing with international audiences or source material in foreign languages. Internationally-focused websites and educational platforms often leverage translation plugins to make their content accessible to a broader audience.