A couple comments...
1st, there are often times when schools offer more "unique" languages because they happen to have found a staff member who is able to teach it. Languages such as Chinese, Japanese, and German aren't offered everywhere. I know my school had Spanish, French, and Latin...but I'm not really sure much else was available because it's tough to find people who teach it.
So it's very possible that at the end of the last school year, they were projecting some of those languages to be available. The teachers may have left after class selections were offered to students. That, or they just really screwed with you guys.
But honestly...are your kids planning on moving to China, or conducting business with the Chinese (who can mostly speak English anyway)? If not, why not have them take a class that may actually be useful to them in the future? I'm sure most of you have noticed the "Press 1 for English" thing that wasn't around when you were young. Spanish is a growing language in this country and unfortunately there are a bunch of idiotas (haha) that won't learn English or have a hard time learning English. Spanish is the most useful foreign language and should be required for all students, since it's starting to become the 2nd language of this country. Anyone who speaks English AND Spanish ends up with a much easier time finding a job, because they're in high demand.
If your kids are going to college then maybe they don't need to worry about it yet, but otherwise they need to use high school as their preparation for the real world. Chinese and Japanese classes are more for fun than for anything else.