I translated the module forumng into french. The text "Subscribe" becomes "S'inscrire" in french.

On the page /forumng/index.php?id=xx where the subscribe button appears, only the text "S" is displayed. I guess it is because of the character ' in the translation "S'inscrire".

The problem appears only on the page /forumng/index.php?id=xx.
The same button with the same translation on the page forumng/view.php?id=xxx displays correctly.

To experiment the problem, use the french translation you can find attached below.

Do you need something else ?