Comment by quesera

I had to look up "crash blossoms"! But that's just an idiom, which is always tricky in translation. It might also be slang. Idioms and slang are borderline dictionary material, different editors make different choices, and they change over time.

But "ginger ale" seems straightforward to me. It's an ale, flavored with ginger. Not even idiomatic, just descriptive. Root beer. Grape soda. Orange chicken.