How Do I Change Chinese Menus to English?

Hey folks, I'm completely new to the Android club. Bought myself an unlocked Z5 on eBay from, apparently, Taiwan. I was able to check the basic language to English in the Settings menu, but I'm still finding some programs in Chinese, and I don't know how to switch them over to English.

Specifically, there's this round purple icon with what appears to be a set of headphones over a microphone that overlays every screen on the phone. When I click it, I'm introduced to a page in Chinese with two checkboxes at the bottom, and then an OK below that. When I click OK, the phone starts speaking to me in Chinese. lol. There's something in Chinese on the top of the screen that ends with the English word "Lite".

Thanks for any help anyone can offer me!

"Secret" menus (IMS and others)

I've been doing since research into since of the hidden menu options on my phone (TMO S6) and I'm looking to get some decent discussion going on trying to figure out what the options are. Mainly I'm researching the IMS menu but there's a treasure trove of others. Many phones, Android specific, I would think have some common menus.

Aside from hoping we can make our phone better (that's the point of being here, right?) and gaining knowledge for even the most mundane purpose. I want to ensure newcomers and those diving deeper into their phones will have a resource to go to. There are simple apps in the store they allow access to these menus, most require no root access and can turn a 0+ work of art into a fancy paperweight. This is more to the point of what I'm aiming for: protection through knowledge. Its inevitable that people will access them and since will come here (or cry anywhere else on the internet) wondering what happened and how to fix it.

That's my grand thought so anyone willing to help please PM me or post here. It'll be a few hours before I update this with some starter info and questions (life/family) so please bear with me. In the meantime feel free to start posting, anything is welcome. Even telling me this isn't worthwhile or that I talk to much (input is input I guess). Thanks everyone.

Sent by the White Rabbit inside the matrix