By high school? Yes. They should’ve seen it and heard it by then. (*)
If they are trying to sound it out for the first time — or spell it — then no.
(*) Take Google AI for what it’s worth (not much, admittedly) but it says the word should appear by second grade (age 7-8) in art projects, and 4th-6th grade for vocabulary.
I knew it by fourth or fifth grade, because of this:
The Silhouette was one of the cars released in the 1968 Hot Wheels series, also known as the “The Sweet Sixteen”. Despite its sleek and futuristic 1960’s design, it is considered the least valuable Hot Wheels car of the 1968 year because there were so many produced. The Cars were packaged with a ‘Collector’s Button’.