Translation probelm

The problematic string: “This %1$s was mentioned…”
It seems %1$s expands to “Article” for posts with standard format. Why “Article” and why uppercased?

Main problem: “This” translates to different words (articles, actually) depending on what %1$s becomes (word gender and such).

Suggestions, either:

1. Make a translatable string for each post format. These are limited, not extendable. Use lowercase.

2. Use post type label singular name for %1$s, but make separate strings for the special cases post, page and attachment (no placeholder). Include a %1$s only for CPTs.

3. Remove “This ” and start the string with the post type label singular_name, like “Book was mentioned…”