why the sourcecode aren't on github , like usualy ?

Because I don't like Microsoft and I'm skilled enough to set up my own server.

And they don't allow me to have a second account for stuff were I want to use my nickname instead of my real name.

In that case, why not use gitlab rather than your service, which isn't compatible with anything?
Also, on github, my name is Fr_Dae, not my real name.
if you have two emails, you can have two github accounts, or two gitlab accounts,

I chose to host my own service as I like to be independent from big tech companies as much as possible. Just accept it. It doesn't need to be compatible with anything but standard git.

Github does not allow multiple accounts even with separate email addresses. I tried it and the second account didn't get activated. I even contacted the support. I was told, it is not allowed.

and gitlab ? i use gitkraken to push issue and commit about transaltion
and i can't use with your services

I use Gitkraken too. It works. Sorry, I end this conversation now.