At the bottom of the menu of your sites is an encouragement to 'Add a new WordPress'. This feels weird in the use of the word WordPress as we don't use that anywhere else.
For example:
I would recommend it should say 'Add a new site' or even 'Add a new WordPress site'. I would not suggest this if we set up the language like this in other places, but we don't. As a result this is a confusing use of the word WordPress.
I think the reason was to normalize WP.com versus WP.org and site versus blog and just have a new noun called "a WordPress."
I'd maybe suggest 'site' then as 'a WordPress' I'd suggest probably makes not much sense to users. That is unless there is some marketing/ campaign to set that as a term. Of course, maybe I'm assuming it doesn't and it does.
On April 14, we moved the "add new {thing}" to the bottom of the menu bar. At this point, we changed the verbiage from "Add new WordPress" to "Add new site" for _new_ users (in SidebarFooter), but it looks like it was not implemented for existing users (in SiteSelector).
New user example (site count = 1), created today:
After much back and forth and deliberation, and much confusion among users unintentionally creating multiple sites when trying to create new posts or pages, I would like to see it changed to "Add New Site" everywhere. This is much clearer and still gives us a fairly agnostic way to frame website vs blog vs portfolio vs store.
Edit: the original choice to make the switch to "Add New WordPress," i.e. WordPress as a noun, was made in 2014 and labeled an experiment. The goal was to mitigate the confusing dichotomy between website and blog and instantiate a "WordPress" as a way to encompass both and beyond, allowing flexibility especially in light of Jetpack-connected sites. 2 years later, I am comfortable calling this experiment and moving forward with clearer language - in this case, "site," which is also being used in most public-facing messaging as a catchall. I think there is still merit to defining and using the idea of "a WordPress," but I think it's best done in tandem with robust messaging, not in isolation in the application.
I would also be for usage of Site — either with "WordPress" in front of it or without. It just seems more clear to me. And it should be synced to all places, as @meremagee mentions.
I would like to see it changed to "Add New Site" everywhere
❤️
Emphasis on the everywhere. cc @michaeldcain since I bug him about this. :)
All blogs (squares) are sites (rectangles). I think users would understand that they'd be adding another site to their WordPress account. Let's just be consistent _everywhere_. #KeepWordPressProper
If we're worried that users might not understand site vs. blog vs. WordPress, we're definitely not helping by calling it different things within our own UI.
This has bothered me for a while. PR up at #7147.
much confusion among users unintentionally creating multiple sites when trying to create new posts or pages
I think this showed up in one of the user tests for the editor as well.
Most helpful comment
On April 14, we moved the "add new {thing}" to the bottom of the menu bar. At this point, we changed the verbiage from "Add new WordPress" to "Add new site" for _new_ users (in SidebarFooter), but it looks like it was not implemented for existing users (in SiteSelector).
New user example (site count = 1), created today:

After much back and forth and deliberation, and much confusion among users unintentionally creating multiple sites when trying to create new posts or pages, I would like to see it changed to "Add New Site" everywhere. This is much clearer and still gives us a fairly agnostic way to frame website vs blog vs portfolio vs store.
Edit: the original choice to make the switch to "Add New WordPress," i.e. WordPress as a noun, was made in 2014 and labeled an experiment. The goal was to mitigate the confusing dichotomy between website and blog and instantiate a "WordPress" as a way to encompass both and beyond, allowing flexibility especially in light of Jetpack-connected sites. 2 years later, I am comfortable calling this experiment and moving forward with clearer language - in this case, "site," which is also being used in most public-facing messaging as a catchall. I think there is still merit to defining and using the idea of "a WordPress," but I think it's best done in tandem with robust messaging, not in isolation in the application.