Ask instead of assuming
Dating norms vary enormously even within one country. Treat cultural background as a reason to ask genuine questions, not as a template you assume someone fits.
Pace expectations can differ
How quickly a relationship 'should' move, how much family is involved, and how directly people state intentions varies by culture and by individual. Talk about it directly rather than guessing.
Shared languages help — shared effort helps more
You don't need perfect language overlap. What matters more is both people making a visible effort to understand each other, including tolerating the occasional awkward translation.