I dated a Mexican woman who’s grandfather was born in California to a family who spoke English. They moved to Mexico when he was five and he learned to speak Spanish.
Way later in life, after moving to Canada, he became ill and went to hospital. While there he became delirious, and began babbling in Spanish. None of the doctors or nurses could understand him.
Had a patient at Madigan at Ft Lewis that had a head injury and had his cranium swell, so they had to take out part of his skull to relieve pressure. HIs had was wrapped, looking like he had a football wrapped to the side of his head. Then they restrained him I had him for 3 months, and then was transferred to another unit for 90days, then back to the Surgical Ward. Sgt Mulner was still there. He had healed up some but still had his head wrapped. He was very combative to about everyone. I went in to his room and told him I was back, and I would be taking care of him again... He calmed right down.
When giving him care, I would tell him what I was going to and why. Most other folks thought he was brain dead. He wasn't. He started mumbling while I was gone, and some people were describing it as he was talking in tongues. His wife visited and I asked her if he spoke another language. She told me that he spoke Hungarian and German. He was born in Hungary, and his family had gotten out when he was young to Vienna. He joined the US Army in Germany, and served there for 3 years and they let him immigrate to the USA back in the 50s.
I went in his room and asked him in English if he spoke German, and got no response. I then asked him in German if he spoke German, and he responded in German. I then if he spoke English, German also, and he answered yes. Then I told him to speak English, back in German... then asked him in English if he spoke English... He answered yes in English... I then asked him in English, how does his head feel.... His response, In English " if hurts like a MF B itch!"
I learned he would speak in his native Hurngarian, which no one spoke there. But I would tell him to speak German, in German, which he would immediately do, then told him in German to speak English.... and then he would speak in English. We had to repeat that process every time he had been asleep. It was just the way his injured brain would process it.
When he finally healed a year later, I would talk to him. He learned to identify people who were spent to take care of him, by their smell, the way they walked, the noise they made when they did so. He also told me every day people man handled him, so he would resist. So they restrained him. I was the only one who had talked to him and told him what we were going to do. That is why he never gave me a problem. Learned a lot taking care of him as a patient.
I thought it was interesting to learn that he reverted back to his native language and then could convert to German and then English. But he had to be told to speak German, in German first, then told to speak English in German.