Ok.. How do I make a factory reset when everything is in Chinese!? Tried entering recovery and I can't even read what it says.

After last update my phone is very sluggish. It reboots 2-3 times per day. And it keeps disconnecting from the wifi frequently. All of the other cellphones in the house have a steady connection. But mine just keeps disconnecting. I'm starting to get really pissed off at this thing. And when I use Sn...