3.2.2 On Input (Level A)
Nothing on a website should automatically change just because a user inputs text, checks a box, or navigates down a drop-down box.
3.2.1 On Focus (Level A)
Nothing on a website should automatically change just because it receives focus.
3.1.2 Language of Parts (Level AA)
If the language of a page or parts of a page is different from the default language of the website, the change needs to be indicated in the HTML code.
3.1.1 Language of a Page (Level A)
Set the default language for each page of your website in the code.
2.4.7 Visible Focus (Level A)
When an interactive element (link, button, form field, selectable element, etc.) receives focus, a visual indicator should show so the user can see what element they’re currently on.