Hi Stefan,
yes, you are sort of right. in most cases the word is used in theology to indicate salvation through Jesus, but the word also means just ”doctrine of salvation“ (in oxford english dic.). Buddhist scholars use it in the buddhist context to say that buddhism is a system that emphasizes the liberation (/salvation) of the individual. I used it as Gethin and Williams use it.
it is quite misleading, I agree, because the doctrine of ”salvation“ in buddhism is very different from the doctrine of salvation in Christianity. Thanks for pointing it out to me.