This is really a question of etiquette
Commonly, the closer the relationship is, the less formal it is, and the more liberties one can take.
A remote relationship
The more remote the relationship, the more effort the person initiating the contact should make to introduce themselves and put the other person at ease.
In the case where you are contacting a person who speaks another language, then at least saying hello in their language shows some effort.
Next, you have to remember that the other person may not be expecting your call, so you should speak in their terms. If it is morning there, say Good Morning.
Next, you would introduce yourself. For example It's Andy, Bill's brother, calling from Columbia.
And move into the purpose of the call.
A close relationship
When the relationship is closer, or the contact is frequent, the people involved tend to evolve their own way of starting the conversation. Depending upon your relationship you may choose to retain fairly formal introductions. On the other hand, you might just continue from where the last conversation finished. It's entirely up to you. It's your relationship.