Related to T56648.
This patch changes the name of the Add menus to Create.
Add: Join (something) to something else so as to increase the size, number, or amount: a new wing was added to the building | some box offices now add on a convenience charge | (as adjective added) : one vitamin tablet daily will give added protection.
Put together (two or more numbers or amounts) to calculate their total value: they added all the figures up | add the two numbers together.
The term 'Add' is somewhat ambiguous, because it's used in maths to add to values together. We even use the term Add inside Blender for this in many places.
The term 'Create' is more specific and unambiguous, and is more widely used for this.
Here I just changed the UI strings, not the underlying Python definitions.
While I think Create is more descriptive, it doesn't fit so well with the default hotkey, Shift-A.
It's also a fairly big user-facing change since this menu is heavily used.
For the Sequencer, it arguably doesn't fit so well either, since the Add menu was mainly used to load existing video clips, which isn't really well communicated by 'Create'