Wikipedia bans AI-written articles, limiting large language models to translation and proofreading

Key points

• By March 2026, AI content violated Wikipedia's core principles so often that writing with large language models was banned outright.
• Remaining permitted AI roles are restricted to translation and minor proofreading, according to the source.
• A Princeton study found about 5 percent of nearly 3,000 new English Wikipedia articles from August 2024 held substantial AI content.

Why it matters for marketers: Content teams relying on AI-drafted reference material should expect Wikipedia to reject or strip such text, so sourcing plans need human-written backups.