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A layer of accessibility that sits across every component. Roughly 1 in 6 people have some form of cognitive, learning, or attention difference. Plain language and predictable patterns help them — and everyone else who's tired, distracted, or reading on their phone in a hurry.
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WCAG covers it less concretely than visual or motor accessibility, but the impact is huge — especially for government services that ask users to make consequential decisions, fill in long forms, or read policy.
Cognitive load is the number-one reason people abandon government transactions. Plain language is often the single biggest improvement you can make.