mueschel thanks for the advice. This is a mistake because SRB Latin tag and the text, is mistake, in Cyrillic.
And the text (alternative name is with error). In the example you wrote to me, I understand that my language code is also wrong.
So it's correct like this?:

Latin name
alt_name:sr-Latn = Šel Adaševci autoput

Cyrillic name
alt_name:sr = Шел Адашевци аутопут

For this example
alt_name:sr = Шел Адашевци аутопут; Шел аутопут
I did not know. Excellent and thank you. Whether after ";" goes to space and then "Шел аутопут"?