WATCH: Truly a God-Sized Mission - The Bible in Every Tongue

She's from Ohio and he's from Alabama, but together they now call Uganda home. There, they are developing a written language for a remote African tribe.

Their efforts are part of a project to translate the Bible into the last remaining languages on earth.

"We are not here just to make ourselves happy," Amber said. "We are here to do something for them to improve their lives."

"I can't even believe it sometimes. This is my life," she added. "I wake up in Africa everyday now."

The setting is picturesque, but nothing in that part of the world is easy. On one trip up a local mountain, the Schrocks found themselves facing raging floodwaters from a sudden downpour.

But it is home.

"We are on our way to Kamajong," Terrill said during the trip. "It is one of the main Ik centers -- a cluster of villages."

Since 2008, the Schrocks have lived among the Ik people. There are about 10,000 Ik tribe members and they live close to the Kenyan border.

Amber is a nurse. When they arrived in the village, she found a woman with pain in her waist.

"We have clinic on Monday, Wednesday and Friday from 9 a.m. to 1 p.m.," she said. "I've been seeing 75 to 100 people a week."

Terrill is a linguist.

"My personal style of language learning is just spending a lot of time surrounded by it," he explained.