NRC Systems for the WMT2025-LRSL Shared Task

We describe the NRC team systems for the WMT25 Shared Tasks on Large Language Models (LLMs) with Limited Resources for Slavic Languages. We participate in the Lower Sorbian and Upper Sorbian Machine Translation and Question Answering tasks. On the machine translation tasks, our primary focus, our systems rank first according to the automatic MT evaluation metric (chrF). Our systems underperform on the QA tasks.