Writing in Ancient Greek with babel

Question

I'm using babel to write in ancient greek.
I'm interested in LGR Latin transliteration, which is described in the following table (taken from here):

Everything worked fine, except for the perispomeni (as in ᾶ) and the dialytika (as in ϊ). Here's what happened:
CODE:
usepackage[greek, english]{babel}

textgreek{'a, <a, >a, `a, a|, ~a, ¨i}

OUTPUT:

The last characters should be ᾶ and ϊ respectively.
How can I fix this?
Thank you!

egreg · Accepted Answer

The perispomeni used to work. The fix is easy, though.

For the dialytika the character to use is ", not ¨.

documentclass{article}
usepackage[greek.polutoniko,english]{babel}
usepackage{xpatch}

xapptocmd{greektext}{edef~{string~}}{}{}

begin{document}

textgreek{'a, <a, >a, `a, a|, ~a, "i}

end{document}

On the other hand, you can also directly input the precomposed letters with the diacritics (not with the combining accents).

documentclass{article}
usepackage[greek.polutoniko,english]{babel}
usepackage{xpatch}

xapptocmd{greektext}{edef~{string~}}{}{}

begin{document}

textgreek{'a, <a, >a, `a, a|, ~a, "i}

textgreek{ά, ἁ, ἀ, ὰ, ᾳ, ᾶ, ϊ}

end{document}

Sebastiano · Answer

Here, there is my answer done with greek.polutoniko package + the to have the correct ~a, and "i. documentclass[12pt]{article} usepackage[greek.polutoniko,english]{babel} begin{document} textgreek{'a, a, `a, a|, ~a, "i} end{document} I add the screenshot compiled with LuaLaTeX. However also your code works fine if you use the correct commands. documentclass[12pt]{article} usepackage[greek, english]{babel} begin{document} textgreek{'a, a, `a, a|, ~a, "i} end{document}

Writing in Ancient Greek with babel

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