Fun fact, I only recently discovered that "renumeration" is an incorrect spelling used by many. It is actually "remuneration".
I'd been spelling this incorrectly for decades
The same for "nucular" instead of "nuclear". The first time I heard "nucular" was G.W. Bush on TV. I thought he was an idiot because a president of a nuclear power ought to know how to pronounce a word that important. I found it more odd that many people pronounced it that way and thought they were either mocking G.W. Bush, or emulating him. I was young and intolerant and thought they were idiots, too. When I had heard it one time too many, I figured there can't be that many idiots and looked up "nucular". I found out that "nucular" has forced itself into the dictionary precisely because too many people pronounced it that way and I was livid.
I eventually toned down my zeal because languages and people are dynamic and ever evolving and reflecting on Montaigne's Essais, written in late 1500s French, lead me to more understanding.
PS: I still consider that using "nucular" is insane.
in many jurisdictions, it might not matter too much what the contact says exactly, contracts are generally drawn up by employers to be in favour of employers and often contain clauses that are optimistically in favour of the employer but may be regarded as unreasonable and not enforced if a disagreement reaches court.
basic rights such as getting paid for work done as an employee will be covered by labour laws.