In Gmail, when I receive a reply to a message with Subject: X, and the reply has Subject: Re: X, it correctly recognises it as a reply and sorts the message in the same thread/conversation.
However, if the reply has a subject Aw: X or Sv: X, as may happen when people use non-English e-mail clients, Gmail appears to not recognise the message as part of the conversation.
Is it possible to tune or configure Gmail to make it understand non-English reply prefixes?
If so, how?