I might not graduate because of 15 credits

I am doing a BA Translation course. I'm in my last year and i orginally registered for a 'Interpreting' module worth 15 credits at the start of the academic year. Just before the spring semester, I was told that the module was no longer taking place so i had to choose a "Other language module". I had already done Spanish in the previous 2 years (I wasn't allowed to pick Spanish again) and was releuctant to pick another language I had no use for. I tried to pick some of the other new courses worth 15 credits but was told it had to be a language. I'll admit, i took perhaps a week to send the language assessment questionnaire thing, (I was focused on my assessments that were due soon but i admit i should have done it sooner). Now apparently i've missed the deadline to register. I don't know what to do...I don't want to do another year just for 15 credits. I'm doing well on the course and I really want to graduate this year. What are my options?