I created a language at age of 12

 Koyako the word derived from tamil name for Guava (Koyyakai)

I used this name for a set of new alphabets which was created in based of english to talk about secrets gossips with friends in my street ..

Year may be 1995 

I had one hard copy in my dairy but I lost it ..

Nearly 1 year i used it..

Last one using this alphabet with me was opposite house girl..

Few years back facebook suggested me her profile but I didn't made a friend request ..

She was already married and settled in US .

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She is the evidence for it.

Hypothetically she may have a softcopy of it.

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Remember i created a alphabet for my own to use it as a morse code at age of 12