Stumped by three strings which I can’t find…

Stumped by three stringsString A string is a translatable part of the software. A translation consists of a multitude of localized strings. which I can’t find in my current installation. What do “Insert More TagTag Tag is one of the pre-defined taxonomies in WordPress. Users can add tags to their WordPress posts along with categories. However, while a category may cover a broad range of topics, tags are smaller in scope and focused to specific topics. Think of them as keywords used for topics discussed in a particular post.”, “Align Full” and “Show/Hide Kitchen SinkKitchen Sink When using the WYSIWYG (What You See Is What You Get) editor in WordPress, you can expand the capabilities to allow more options. This expanded area is called the "Kitchen Sink."” do?