Build a question answering system in your own language

Hello to everyone. I want to build a question answering model in Greek language in order to help my students in mathematics. My pro lem is that for the greek language I have only found a greek masked language model which has been trained in wikipedia with no knowledge of mathematical terms. Can someone please tell me what steps I should follow in order to accomplice my goal? Two years now I am trying with no luck. The way I have thought about it is that I will have some texts with mathematical definitions and methodologies and when a student asks for example “how can I solve a first order equation " or " I need help in equations” the model will select the most relevant text.
Should I use the greek masked language model I have found on hugging face and train it more on greek mathematical context and after that train it on the question answering task? The multilingual models I have found for the question answering task dont seem to work very well on greek mathematical context. Any help or guidance would save me a lot of time. Thanks in advance and excuse me if my post is out of topic