Hi, I had the same problem – it seems that Twitter was forgotten when qTranslate support was added to the plugin. 😉
For everyone else having this problem:
Replace your inc-cl/tw.php with the code from here: https://pastebin.com/2HZG3BvL
I added the line
if (isset($options['qTLng'])) $lng = $options['qTLng']; else $lng = '';
and changed all the lines that now contain
It’s working fine for me now!
Maybe the author will adopt these changes in the next version. 😉