Reference Information: Definition of Text Symbols 
Some texts in PI sheets and cockpits must be made available in several different languages (for example, menu functions). This means that when you log on to the SAP System in a different language, these texts must come up in the correct language.
You can use text symbols that you have created in an ABAP program for all files of MIME type TEXT . These texts can then be translated using the SAP translation tools. The text symbols are automatically replaced in the HTML document before it is loaded. This means that the text is displayed in the language in which the user has logged on to the SAP System.
Text symbols are defined as follows in the XSL style sheet:
<!--#text- TextID( Programmname)#-->
Example
<!--#text-001(SAPLPOC_MAIN)#-->
In this example, text symbol 001 is provided by the ABAP program SAPLPOC_MAIN.