WTF? What kind of terrible translation is this where something that is needed for the game itself is not translated? What's the point of such a translation?
This is more of a technical problem than anything else.
Most text-scripts can be run through MTL and processed as batches which is the bulk of the translating work, but choices in games are sometimes implemented as images or as scripts which can break if anything in the script is changed. Translating scripts is just a bad idea and requires a lot of testing to make sure nothing breaks after modifying them. Translating images, especially for people who cannot read Kanji/Katakana/Hiragana requires OCR software in addition to Translation software and then image editing software + repackaging software that works to repackage the translated images. And that is on top of the workflow needed to get the game to render the translated dialogue text. As a technical problem, there is currently no way to fully automate it in the same way that dialogue translation can be automated even if each individual step is not that complicated. The software just does not exist, so a human eye needs to look at it and decide if it worked or not at some point, unlike dialogue translation which can mostly be left untouched.
Basically it takes time, a lot of it, exponentially more compared to just doing the dialogue. If the original translator, in this case Sugoi Visual Novel, did not take the time to spend 5-10x+ longer working on this title, then the images cannot get translated. SVN never translates images, so if that is important for you, then be sure to avoid MTLs by them.
The point is to make the dialogue available at least. Literally better than nothing. If you disagree, then do not bother with MTL. For anyone who really wants the choices translated, you can always use OCR software yourself to copy the characters and dump them into google. Examples include MS Powertoy OCR, and Capture2Text (tesseract), Google lens. Getting that back into the game so it can display it is incredibly complicated and time consuming which is why many MTLs do not bother with it.