The cousin
In French, 'Le cousin' is used to refer to a male cousin. To refer to a female cousin, you would say 'La cousine'. Similar to English, 'Le cousin' can be used in multiple contexts. For example, when speaking about family, introducing someone, etc.
My friend's cousin is very friendly.
In this sentence, 'Le cousin de mon ami' means 'my friend's cousin'. It is used to denote a close relationship with a person, who is not a blood relative but is treated as a family member due to the existing friendship.
I am going to visit the cousin this weekend.
Here, 'Je vais rendre visite au Le cousin ce week-end' means 'I'm going to visit the cousin this weekend'. In French, it's common to say 'rendre visite à [person]' when you mean you're going to visit that person.
The cousin works in an international company.
The sentence 'Le cousin travaille dans une entreprise internationale' is translated into English as 'The cousin works in an international company'. It indicates that the person referred to as 'the cousin' has a job in a company with international operations.