Stack Exchange network consists of 178 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
Similar to this, I do not see a difference between wlan and wifi.
Especially this answer says it all.
There aren't that many wlan questions. I think the best approach here is to manually retag them and let the system purge the tag.