Country's customs

I wrote this as homework, my teacher said it could improve but didn't say how to, can you help?

All countries have their own group of specific unwritten rules that every local follows without even knowing about it. In the UK, mainly in London, it is very common to talk about the weather in regular conversations but in the USA it could be seen as <s style="background-color: rgb(240, 102, 102);">a</s> small talk <s style="background-color: rgb(240, 102, 102);">topic</s>. One’s perception of reality and <s style="background-color: rgb(240, 102, 102);">its </s>their interactions with other individuals may be interpreted as a local culture, or you could say “culture” instead. I don't think you need this part - it just repeats what you've already said.

The country’s culture is something very powerful as it influences the relationships between friends, business acquaintances and even moral standards. Northern hemisphere countries This isn't wrong, but it would sound better if you said "Countries in the northern hemisphere", for instance, have been very close to democracy since before the 18th century and today their people have a strong feeling about what is privacy and freedom. On the other hand, countries that have flirted with dictatorship in the last 200 years usually don’t care as much as their upper hemisphere counterparts. You see the former have trouble putting their personal data in the hands of people they don’t fully trust, since that gives power to those unknown forces, but the latter <s style="background-color: rgb(240, 102, 102);">have</s> do not see that as a big issue. Thus, they accept technological changes more easily. That explains why we see so many digital banks rising in Latin America <s style="background-color: rgb(240, 102, 102);">regard </s> while many European cities majorly use local bills.

It is very interesting to study how a society works by analyzing how its culture has been changing. Then, by understanding different realities, we may be able to make our own a little bit better.