That’s when he found the forum post. It was an old thread, buried deep in a digital archiving site. A user named PolyglotKing99 had written: “Forget the apps. The fastest way to functional fluency is frequency. I found the holy grail: a PDF verified by a Cambridge linguist containing the 625 words that make up 80% of daily conversation. It’s not public domain, but here’s the link.”
[Generated for academic review] Date: April 19, 2026 Subject: Applied Linguistics / Second Language Acquisition (SLA) 625 words to learn a language pdf verified