The eight new strings shipped as English placeholders in every non-English
catalog. Translated for cs/de/es/it/ko/nl.
Where a locale's course table already names the Download course itself, that
existing term is reused rather than a fresh coinage -- Korean's 다운로드 코스
is the catalog's own translation of course code 17, so the options flow now
says what the appliance display says. German and Dutch had no equally
distinctive existing term and build on the adjective already used for the
downloaded state.
Counts are not pluralized. The strings have no plural support and the
placeholders are raw numbers, so Czech, Italian and Dutch use the plural form
regardless of count -- the same simplification the rest of these catalogs
already make.