Should I Learn Easy Japanese Rather Than English?

Yesterday, after working, I took a workshop of Medifone Corporation, produced by Ministry of Health, Labour and Wealth.

It's 

"Teamwork Beyond of Medical Facility".

I found, that foreign travelers occurring sudden illness are needed much effort and money.

I think, it's very troubling and more medical staffs are needed.

And I found,

"Some foreign travelers can't speak English very well, and we need easy Japanese rather than English."

So, I'm very straying.

has it been no use for me to learn English hard?

1.5 billion people study English, I heard.(3 million people study Japanese.)

I want to also learn easy Japanese, because I want to communicate foreigners more and inform Japanese culture of them.

But I couldn't find where I can learn easy Japanese in Miyagi.

There is also a public flyer about easy Japanese.

I heard, that the teacher of Japanese has become national qualification.

Should I study qualification of the teacher of Japanese?