If you create a contract with intent to mislead people and having them sign it with the expectation that they won't understand/read/validate the contract language, then the other party definitely can claim fraud afterwards and (depending on the circumstances and evidence) may win such a claim. Contract law is about intent above all, the actual contract language clarifies and documents that intent, but in circumstances where the contract language and intent clearly diverge, any adjudication must and will take intent into account.
To be specific, "intent to deceive" is a key part of the limitations in contract law in pretty much every jurisdiction. Fraudulent misrepresentation, which explicitly includes withholding information as well, can invalidate the whole contract if you (for example) tricked someone into signing it i.e. 'fraud in inducement' and in such cases the harmed party definitely can claim fraud even if the contract language explicitly said that they will lose their money, if the other party mislead them into thinking otherwise.