Why do many phones display “Connect WLAN” instead of “Connect Wi‑Fi”?

When you’re looking for internet at a hotel, mall, or café, the staff clearly say, “The Wi‑Fi password is 88888888.”
But if you open your phone settings, what you see is “WLAN.”
In fact, they aren’t exactly the same:
WLAN is the umbrella term for “wireless local area network,” while Wi‑Fi is the most common WLAN technology today.
A simple way to understand it:
WLAN is the “broad category,”
and Wi‑Fi is the most famous “brand player” within it.
It’s like when you say “call a taxi,” and the one that arrives might be Didi.
So having your phone say WLAN is more precise, while people usually find “Wi‑Fi” easier to say day to day. In practical use, tapping into WLAN basically means connecting to Wi‑Fi.
Are you saying it as “wrong-fa,” or “waifai”?