This may be a result of your feedback, but for me looking just now it it front and center: "Sourcetrail - A cross platform source explorer for C/C++ and Java"
Although physically front and center, the fact that that line is nearly the smallest thing on the page caused me to gloss over it entirely my first time through.
it should be in a bigger font, and it seems like it's the only place where language compatibility is clearly visible without going into the documentation.