You can model a data flow for a service to specify the functions, constants, and events from which the selected function or selected event is to receive data.
Procedure
Create a data flow for an object of the Automated task type.
Define the language for a predefined text, if required. For example, this may be Inhaltsverzeichnis in German and Table of contents in English. Use ISO code 639 for the language codes, for example, de for German and en for English.
You have defined a language for predefined texts of a service.