French product UI scores 92 on this line, with a length mark. Spanish, Japanese, and English product UI score 100, 100, and 100. The extra rule runs for German and French only.
It also asks for a line with no period, longer than 32 characters and shorter than 90. This one is 53. A line that already starts with Button, Label, or CTA is left to the other rule, below.
The homepage scans the bare line as US English store copy, so the score is 100. Write it as “Primary button (de-DE): Kostenlose Testversion jetzt ohne Kreditkarte starten” and the homepage scores 92, because every scene marks a Button, Label, or CTA whose text after the colon is longer than 28 characters.