$npx -y skills add Owl-Listener/inclusive-design-skills --skill plain-language-designWrite and review content for plain language accessibility. Use when writing interface copy, error messages, instructions, onboarding text, help content, legal or medical information, forms, or any user-facing text. Triggers on: plain language, reading level, simplify text, jargon
| 1 | # Plain Language Design |
| 2 | |
| 3 | Write and evaluate content so that people with cognitive disabilities, |
| 4 | low literacy, non-native language skills, or high stress can understand it |
| 5 | on the first read. |
| 6 | |
| 7 | Plain language is not dumbed-down language. It is clear language. It |
| 8 | respects the reader's time and cognitive resources. |
| 9 | |
| 10 | ## The Tests |
| 11 | |
| 12 | ### 5-Second Test |
| 13 | Can someone read this sentence and understand it in 5 seconds? |
| 14 | If not, rewrite. |
| 15 | |
| 16 | ### Jargon Test |
| 17 | Would someone outside your industry understand every word? |
| 18 | If not, replace the word or define it inline. |
| 19 | |
| 20 | ### Action Test |
| 21 | For any instruction or button: is the next step completely unambiguous? |
| 22 | "Save and continue" beats "Next". "Delete this item" beats "Remove". |
| 23 | |
| 24 | ### Passive Voice Test |
| 25 | Passive voice hides who does what. |
| 26 | "Your application has been rejected" → "We could not approve your |
| 27 | application. Here's what to do next." |
| 28 | |
| 29 | ### Sentence Length Test |
| 30 | - Aim for 15–20 words per sentence maximum |
| 31 | - One idea per sentence |
| 32 | - One instruction per paragraph |
| 33 | |
| 34 | ## Common Replacements |
| 35 | |
| 36 | | Instead of | Use | |
| 37 | |-----------|-----| |
| 38 | | utilise | use | |
| 39 | | facilitate | help | |
| 40 | | implement | set up / start | |
| 41 | | terminate | end / stop | |
| 42 | | prior to | before | |
| 43 | | in order to | to | |
| 44 | | at this point in time | now | |
| 45 | | in the event that | if | |
| 46 | | with regard to | about | |
| 47 | | commence | start | |
| 48 | | sufficient | enough | |
| 49 | | subsequent | next | |
| 50 | | indicate | show / tell | |
| 51 | | modify | change | |
| 52 | |
| 53 | ## Readability Benchmarks |
| 54 | |
| 55 | - General public: grade 6–8 reading level |
| 56 | - Specialist audience: define terms, short sentences |
| 57 | - Critical content (medical, legal, financial): plain language summary |
| 58 | alongside the full text |
| 59 | - Buttons, labels, error messages: grade 4–6 always |
| 60 | |
| 61 | ## How to Review |
| 62 | |
| 63 | 1. Read every piece of text aloud — stumbles reveal complexity |
| 64 | 2. Check sentence length (count words — flag any over 25) |
| 65 | 3. Identify jargon, acronyms, and idioms |
| 66 | 4. Verify every instruction has a clear, single action |
| 67 | 5. Check that error messages say: what happened + why + what to do |
| 68 | |
| 69 | ## Output Format |
| 70 | |
| 71 | When reviewing: present a table of flagged text with the original, |
| 72 | the issue, and a rewritten version. When writing: produce plain language |
| 73 | content with a note on the target reading level achieved. |