It’s not proficiency, that you skipped a level or have a penpal. And not claiming some “passion,” but how you went and activated, took on greater challenges, more than classes or a program. “Show, not just tell.”
Fine to pick German. But may be wise to tie it to other academic interests, as well. With purpose. And with relevant activities, outside the usual hs box. How do you use this skill, besides personal enrichment?