When Donald Trump has telephone conversations with other world leaders whose first language is not English how does he convey his meaning?

Yup

That is why translators at the international diplomacy level are sp very vrfy very good

In the first place, most languages DON'T translate *exactly* anyway. In the second place, add in various dialects, regional jargon and phrases, etc. if the translator doesn't know either language well enough, it could end very badly for all concerned.

Simple Example:

Look at the US when it comes to the bubbly/fizzy sweetened drinks. A "pop" to some is what others call "soda". In certain states, if you ask for a "Coke" or "Pepsi" in a restaurant, your waitress will ask "What flavor?" - meaning Mt. Dew, Root Beer, or whatever else they serve - so even if that establishment calls it "Coke"...Mt. Dew is a Pepsi product! And vice versa for "Pepsi" when someone wants a Sprite (which is obviously a Coke product). That simple thing alone can cause mayhem even if you've grown up in the USA calling it one thing and travel to another area where it's called something else. I'm from a "pop" area...my first trip down to Florida...stopping in Georgia to eat...was very, VERY, confusing. All of those fizzy drinks were called "Coke" where we stopped. Add in the fact that where I live, a restaurant can NOT serve Coke products AND Pepsi products...I was equally confused when the waitress said "Coke" yet they had Mt. Dew. I figured I was going to be stuck with a Sprite since I can't have Coca-Cola itself.

The translators, being so high ranking, especially in a government job, would have to be well-versed enough in BOTH languages to get the main points across to the other.