The Gothic script used in codices Argenteus and Ambrosianus is encoded with more than 24 bits in Unicode/UTF-8. We say they are in the “Second half-pane”. Almost everything else of merit gets encoded with less than 24 bits, so software makers sometimes implements UTF-8 only up to 24 bits and hope that language minorities, who want to use characters above the limit, will be imprisoned for hate speech before reaching their office.
For LaTeX, I have tested only with XeTeX and TextEdit on Mac. We will use the fontspec library. We will also need a Wulfilan typeface as *.otf or *.ttf. We can place a copy in the catalogue where we have the .tex-file.
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