Every web developer knows what a «fish» text is. This text, despite the name, has nothing to do with the inhabitants of reservoirs. It is used by web designers to insert on Internet pages and demonstrate the appearance. Since the purpose of using such a text is exclusively demonstration, then it is not necessary to carry the semantic load at all. Moreover, the unreadability of the text will play into the hands of evaluating the quality of perception of the layout.
The most famous «fish» text is the famous Lorem ipsum.