There is no BBC official Gallifreyan language – although they do hold the copyright on the name. However, Whovian Loren Sherman created an alphabet for the Doctor’s native tongue which is based on what we’ve seen already and holds together very well.
A great guide on Gallifreyan can be found on Time Turners that takes you through letter, word and sentence construction. It’s an alphabet that uses parts of circles and then dots and lines to annotate. Words are built up from circles within circles.
As it happens, Sherman does not just have a knack for complex languages but, oh, wait, he knows Java too. You can download is free Gallifreyan translator here and see what your own name looks like.
If you’ve asked yourself “How do I write my name in Gallifreyan?” because you’ve seen people posting theirs then most likely is that they used this system.
I thought it might be interesting to see what Trenzalore looks like in Gallifreyan…