Hi Filippo,
Sorry for the incredible delay in responding.
So the “funny character” is meant to be part of a language icon. I agree that it isn’t a perfect solution as there doesn’t (yet) seem to be a universally-recognized icon for “language”. But this is the idea:
https://www.google.ca/search?rlz=1C1GCEA_enCA778CA778&ei=_nYhW_-WBoXm9APr5IP4Bw&q=language+icon&oq=language+icon&gs_l=psy-ab.3..0i67k1j0i7i30k1l6j0j0i7i30k1j0.105546.106536.0.106707.8.8.0.0.0.0.94.624.7.7.0….0…1c.1.64.psy-ab..1.7.617…0i10k1.0.uc1hyXxAXGU
And BTW, although osTicket Awesome only supports the languages that osTicket supports, I have gone ahead and added a Swedish flag. It will be included in the next update (v1.4) which will be released in the next 2 or 3 weeks.