It is very important, like 9/10, to know the culture of the country you are working in/with. There can be a huge difference between different cultures in terms of the communication style, organization structure, relationship with your colleagues and direct supervisor, personal life after work, and teamwork... etc.
For example, East Asian cultures tend to be more indirect in communication. People don't call out when they disagree with other colleague's opinions. They express their disagreement in an indirect way. Needless to say the disagreement with your supervisors. That brings in the difference of organization structure and hierarchy as well. Some organizations are flat and some are complicated. Asian cultures take hierarchy seriously. People expect new employees to respect and follow orders from senior employees and supervisors/managers, sometimes personal opinions are not allowed to express.
Regarding the personal time after work, some cultures value family time so colleagues do not have much interaction after office hours. Some cultures think it is necessary to net work with colleagues at dinner after work and drinking occasions afterwards so the team expect every team member to join dinner or drinking gathering.
It is very interesting to learn different cultures and how people interact. If you have friends or colleagues from the culture/have been to that country you will work with I encourage you reach out to them to express your interest in knowing that countries, or search culture introduction videos on YouTube I believe there are a lot.