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Every human being has different memory systems, while mastering a language requires the strength of brain memory.

In the brain, there is procedural memory which has functions enhance accent and declarative memory which capable to remember new words (every language has at least 10.000 new words plus grammar).

Words and sentence structure then should be pronounced fraction of a second so it should be programmed into memory 'explicit' and 'implicit'.

Some study show that someone who is able to speaks with different languages could increase the intensity of attention and memory.

These things affect the delay senility.

There are an arguments in the US, Australia and England that a foreign language is not necessary because people around the world are using English.

However, the hyperpolyglots deny this assumption.

They believe advantage of foreign languages are numerous, including making a friendship around the world.