I know the title is extremely vague so I'll try to explain it with an example. For example, if a company makes some errors, and then instead of acknowledging the responsibility for their mistakes, they instead say things like: "Even Apple makes mistakes, how can you expect our products to be 100% error free". What kind of language is this called?
It's a form of negative language. Other words I thought were "pessimistic" or "accusatory" or "complacent", but I'm not entirely sure if these words can be used to describe the example I gave most accurately.