On paper, foreigners in most countries work under the same contract law as locals, and that is worth knowing because some employers imply otherwise. The real differences come from the visa layered on top. A sponsored worker whose permit is tied to one employer has less bargaining power and a bigger downside to dismissal, since losing the job can mean a short window to find a new sponsor or leave. Learn exactly what that window is before you need it.
Foreigners are also offered fixed term contracts more often in some markets, which affects renewal risk, severance rights, and rental or mortgage applications.
Before signing, check probation terms, notice periods, who pays visa and relocation costs and whether they claw them back if you leave early, non compete clauses, and what happens to your status if the company folds. If the contract is not in a language you fully understand, get a translation.