OP, owning alternate accounts is not prohibited. In addition, even if this is true, then all three accounts today participate in different signature companies. One of them speaks Turkish and has posted in the Turkish local section. 
There would be more evidence, at least on a linguistic basis, but even here I did not find any matches. Although it would be very easy to have three accounts and make a mistake and write in Turkish at least once, But it doesn't; at least I didn't see it. 
In any case, if you accuse, you should provide additional evidence, not just these three accounts. So far, you haven't done enough of it.