"custom admin text" related problem

First of all: What the difference between the lite and regular version?

Here’s the problem I am facing:

1. I have changed the word Worpdress to ABC and it works everywhere, including widgets on admin dashboard.

BUT

2. When I change another word, say PIG, which is the part of a plugin, into say CAR, it does not bring this change eveywhere in the dashboard. For example, in the current case, it does not change PIG inside a widget on admin dashboard into CAR.

What could be the reason and how do I resolve this?