.i la lojban cu mutce lo ka smuske tinsa .i ku'i ly. na logji prane pe'i .i loi jbopre cu piso'iroi da'asnu lo ka prane nitcu .i ru'a lo klamburi cu na'e lojbo ka'u .i jy. xebni lo malgli .iseju lo nu lojbo klamburi zbasu cu nandu ba'a jeku'i cumki

Lojban is very semantically rigid, but not perfectly logical IMO. Lojbanists often argue about the necessity of logical perfection. I suspect that puns might not be seen as culturally Lojbanic. Lojbanists hate Anglicisms or bits of English leaking into the way they speak Lojban. Regardless, making Lojbanic puns might be difficult but it's possible.