What is plain language in UX design?
Plain language is the practice of writing interface text in a way that users can understand on first reading, without specialized knowledge, prior familiarity with the product, or rereading. It involves choosing familiar words over technical jargon, writing short sentences, using active voice, organizing information so the most important content comes first, and structuring content so users can find what they need quickly. Plain language is a foundation of content design and a requirement under WCAG 3.1 for accessible interfaces.
Why is plain language important in UX design?
Most users do not read interface text carefully. They scan, pick out key words, and form quick judgments about what a page or message means. Dense, technical, or complex language fails in this scanning context because users miss critical information, misinterpret instructions, and make errors that clear writing would have prevented. Plain language reduces cognitive load by removing the effort of decoding unfamiliar vocabulary or untangling complex sentence structures. It also supports accessibility for users with cognitive disabilities, low literacy, or those reading in a second language.
How to apply plain language in interface design?
Use the words your users use, not the words your engineering or legal team uses. Write in second person, addressing users as "you" rather than "the user." Prefer active voice: "Save your changes" rather than "Changes will be saved." Keep sentences short. Put the most important information first. Avoid acronyms unless they are universally known. Test your copy by reading it aloud: if it sounds unnatural, it will read unnatural. Test with real users: what seems obvious to the team often confuses users who do not share the team's context and assumptions.