I created a QuForm on a WordPress-Site (set to german as main language, multilangual with polylang).
The element “file upload” contains a button to browse the computer-files. But the label from that button is: “Datei auswählen …” (translated: select file …)
I could fix it with a workaround: Changing the “translation”, and fill in the exact same text as the default. This removed the pseudo-code from the button.
But, I recommend to fix this bug, which is obviously in the german localisation.