I feel that everyone could learn and apply the idea of having clear, concise language without jargon.

I've hear this notion called "international English". English spoken in a way that non-native speakers find relatively easy to understand and follow.

The hard part of this is that non-native speakers will rarely ask for this. It's a gift that you have to give, and a gift you have to encourage others to give. And most of all, it needs to be done in a way so as not to be condescending, by simply being clear.