The home link (SVG logo, pointing to https://wikimediafoundation.org/) is available twice directly in sequence without obvious use.
But it doesn't feature any alternative textual content/discernible text, leaving screen readers behind – reading the link address at best. @TheDJ has already provided a PDF showing current HTML markup and its issues.
- Add alternative text (“Wikimedia Foundation”) visible only to screen readers with .screen-reader-text class
- Put aria-hidden on the second logo in main#content
Pages aside of front page show logo (display:block vs display:none) on different screen sizes and therefore screen readers are only exposed once to it.