How to cite non-English text?

Does anyone know how to cite non-English text?
I mean, how can I provide own translation of non-English text?

I have found that Author A used a block quote to cite text in a Swedish article by Author B. Provided text by Author A was in English. This indicates that the author A translated Swedish text written by Author B. No indication of translation was given.

I think this is a matter of validation.

I was thinking to use Author A to mention what Author B said. This is possible by the use of a secondary citation. However, secondary citation needs to me mimimal. The best way is to translate Author B's work by myself. But I will become the same as Author A. No validation.