Principle 3 Understandable · Guideline 3.1: Readable
3.1.2 Language of Parts
Passages in another language are marked up.
What this means in practice
An English quote inside German text needs lang="en" to be pronounced correctly. Words absorbed into the language are exempt.
Normative wording
The binding text lives at the W3C. What you read here is our own faithful rendering – not a quotation.