Todays world is so global and imagration so high kids need to be multilingual just to survive. So yes the earlier you start teaching it the better the result and the faster the learning.So yes prek kids even. The brain will greatly benefit. It is a critical skill in todays world
Being able to learn another language is beneficial to a "globalized economy". People that can speak multiple languages is an advantage. A child learning a foreign language at that grade level would benefit him/her because it would be easier for them to grasp the language. Kids learn faster and easier if something is exposed to them at an early age. Instead of having them to take it in high school in which a few months/years down the road would be forgotten, learning it earlier would instill that memory longer. Learning a language is mostly about time and practice. Merely taking 2-3 years of a foreign language in high school doesn't make a student at least fluent. A slow process and early exposure to it makes it easier and efficient for the child. As the years go on, the child can integrate more vocabulary to the language his learning. Also it gives a child a feel for other cultures and learn from them.
Kindergarten should have foreign languages being taught, so part of kindergarten should include lessons being taught in another language. This is ideal because it will help American citizens relate to other parts of the world and also perhaps encourage them to travel as they grow older. Europeans often know multiple languages already.
There have been tests which prove that learning a second language significantly improves cognitive function and allows a child to build a bridge to a second culture and tear down language barriers. If you look at the world as a whole, more than HALF of it's population is at least bilingual.. Half of 7 billion people!
The age of a child's mind at the stage of kindergarten is prime in its cognitive ability to absorb information for long term retention like that of a sponge. It is well known that shortly after the age of three, is the best time for children to begin learning things in a natural way that they are exposed to. Language is one of those perfect elements for which young children have no problem learning.
Though I don't think all kindergarteners need to be required to take a foreign language, I think that teaching kindergarteners a foreign language is a good idea in general. It would be an ideal time for someone to learn a foreign language, because their brain is young and learning new things is usually easier than for an older person. A kindergartener would probably be able to pick up a new language better than a much older person and this would also be a useful and beneficial skill to have.
Young children should definitely be exposed to foreign languages. The human mind is much more able to process foreign languages at 6 than at 16. Our current system of teaching foreign languages needs an major overhaul. Foreign languages need to be taught earlier and stress conversation over reading and grammar.
A second language, sure. English is a great second language to teach at kindergarten level, and I think many regions do that already. English is often the language of official documents and langauge books, even if it is not the primary native language of people there. The kindergartners will probably encounter uses of their second language somehow.
However, to teach a foreign language at kindergarten is far too early. There was a couple who tried to make their child speak Cantonese, Putonghua, English and Japanese and their child ended up being unable to form even simple sentences in Cantonese. Foreign language classes can be provided as an extra to kids who are extremely gifted in language, but the vast majority of kids cannot handle a language they will only learn within the confines of a classroom in which they spend a limited amount of time per day.