records aren't kept on this topic, but it certainly has happened many times.
Experiencing a trance and speaking another language could be a manifestation of a dissociative state or a phenomenon known as xenoglossy, where a person speaks a language they have not consciously learned. It could be a result of subconscious processes or suggest a deeper connection to the language or culture being spoken.
She was taught her own language by feeling an object and having the word spelt out in her hand by another person. She also learned to read brail.
Anyone can learn sign language, but sign language is mostly associated with deaf and hard of hearing people which is their native language. (Although quite a few don't know sign language and learned language via oralism method.)
A person who translates one language into another is called a translator.
Since there are many thousands of languages in the world, I somehow doubt that there is any person who has learned them all.
A foreign language speaking person is someone who can communicate in a language that is not their native or primary language. This individual has learned to speak a language that is different from the one typically spoken in their country or region.
If you want to learn another language you should learn it. If you learn another language it would allow you to communicate with those people who speak it so if there are people who speak another language near you learning there language would allow you to do business in that area and be there and talk to them. Knowing another language can be good for a job depending on a person position and if they would be doing international business or interacting in public relations.
A person who translates one language to another is called a translator.
No. Many people learn sign language simply as another language.
Languages are learned through exposure and practice. This can include listening to and speaking the language, as well as reading and writing in it. Immersion in the language and culture can also greatly aid in language acquisition.
Languages can be learned by taking a class online or in person. Try your local high school or college if you're interested in learning a language.
"Mother tongue" refers to the first language a person learns or the language spoken at home during childhood. It is often the language that a person feels most comfortable communicating in and is usually associated with cultural identity and heritage.