Thanks for the hint! That opens a door.
eg I want to misuse %do as a placeholder. How can I import another text?
...
case 'd': // debug boolean
//original if (c2 == 'o') addStringOnOff(Printer::debugEcho());
if (c2 == 'o') addStringOnOff("tt");
..
That is not working, "An" is added in the text
#define UI_TEXT_PRINT_TIME_DE " %do"