This reminds me of a chapter from Clean Code by Robert C. Martin where he suggests using names from the "solution domain space" ie. CS terminology, because names are succinct and more precise which is preferred over long names that are tied to some specific domain for which the software is being developed for, which might require expertise that is disparate. The author suggests to use terminology from the "problem domain space" when "there is no 'programmer-eese'" name for it.

My team had a discussion about this and some argued that this might alienate programmers who are novices, and might be easier to use "Enlgish" but I think that if the problem space for your software is niche enough then a new team member, or a novice will have to learn terminology either way. In my opinion, programming terminologies are more precise and transferable to other programming jobs and problems in general, so is a more sustainable and relevant way of learning. It might be tough at first, and I agree the attitude of the senior dev would make a huge difference, but as long as the senior dev takes the initial confusion of the novice as a good teaching moment, and explains it patiently and clearly I think it can be more valuable in the long term.