While I do not know the law specifics of Spain, here in Portugal after 2 months of non payment you can demand the "cancellation" (not sure if it is the right wo

While I do not know the law specifics of Spain, here in Portugal after 2 months of non payment you can demand the "cancellation" (not sure if it is the right word) of the contract, and leave the job, there may be more specifics into it and my advice would be to see what are your legal options. I have been in a similar situation and my plan was always to wait for the 2 months and started searching for a new job, but they ended up paying everything at most with 2 weeks delay. If you just started and there are delays like that, you dont trust the founder, etc, then leave it is better for you, I don't imagine myself being a startup founder and just leaving my workers in the dark just because I want to get married, I would find some time to make the proper arrangements for the wages, explain everything well and then get married.