the current dmd compiler (for D programming language) available in SPOJ is 2.072,
since then many version have been released including DMD 2.073,DMD 2.074,…,DMD 2.087
please could you update it to the latest stable version DMD 2.087.0 https://dlang.org/changelog/2.087.0.html
I am interested in submitting solutions in D. How do I select my language? Couldn’t find it in the site. Is the language deduced automatically from the source code?
Yes, and automatically is deduced you are woman or man!
Of course is not possible. When [when?] you will submit your solution, probably you see Ada95, click on small arrow and you see list of all available languages. Then click on what you want.