"Regional & Accessibility" in KControl has "Input Actions". You can define text blocks and have them inserted by pressing shortcuts (Win+something, e.g.). It is clumsy to configure but a good start.
However, I am missing Perfect Keyboard from Windows. The shortcuts were triggered by the Space bar. The program seems to monitor all keyboard input. It also counts the characters typed. When a certain combination has been typed, it sends the appropriate number of backspaces and inserts the desired stuff. Date codes could be inserted too, even mouse movements included in macros. See
http://www.pitrinec.com/pkindex.htm. I've been using it for almost 10 years. My current shortcut file has ~500 items, easily remembered because of a logical naming scheme.
If the KDE developer taking care of input actions is reading this - please have a look at this program, it saves *very* much time and even the basic the functions would be great to have in KDE. "Input Actions" is a very good start. Thanks meanwhile, Andreas v.H., Vienna.