Hedgewars uses the same font as SMC, so the same procedure to properly display Chinese applies.
It seems that Hedgewars has incorporated a translation made by students in one of my courses - which I only found out through checking SVN, since there was no feedback. Anyway, part of the text will display right away, but only part. You will still need to replace the embedded font file the same way as I described for Secret Maryo.
I installed Hedgewars from SVN here on Linux, so my path here is