Yiddish diacritics (niqqud/nikkud) are not displayed properly

The bug

19w34a added Yiddish as a language. However, the diacritics / combining marks that Yiddish uses are not displayed properly, both in the default Minecraft font, and in the Unicode font. They are supposed to be combined with the preceding character.

The same is probably the case for Hebrew vowel markings, though I don't think the Hebrew translation uses those.

I'm not too familiar with the Yiddish/Hebrew script, so if a native speaker (or someone who is familiar with it) could educate me about the proper terms, and how exactly this would need to be implemented, that would be very appreciated.