Request: Ŋ ŋ

I’d like to request adding support for the letter eng. I am aware that the letter is used in IPA and is part of the AL-5 character set, so it is already in the pipeline. However, by adding it alone, you will support several languages such as Ganda (6.5 million users), Wolof (5.2 million users) and Lakota (2100 users; would require using combining diacritics for ǧ and ȟ), and be underway to supporting languages like Northern Sami (26 thousand users; ŧ missing), Dinka (1.3 million users; ɛ ɔ ɣ missing) and Fula (29 million users; ɓ ɗ ƴ missing, as well as ɲ in some orthographies).

The relevant codepoints are:

Ŋ U+014A LATIN CAPITAL LETTER ENG
ŋ U+014B LATIN SMALL LETTER ENG

The capital Eng has two main alternative glyphs: a capital N with a descender (preferred by Sami users), and an enlarged version of the lowercase eng (preferred by African users). Given all of this, the reference glyph should be the enlarged lowercase form, but most typefaces on Google Fonts seem to have it default to the capital-N form. I’m not sure if this is simply because they do not intend to support African languages, or whether there is something I’m missing, but Source Sans Pro seems to be alone among the most downloaded typefaces in defaulting to the enlarged lowercase form. In any case, both glyphs should be available, either through the locl feature or stylistic sets.

Start with the existing AL-5 character pipeline referenced in the issue and inspect how Source Serif represents glyphs and OpenType alternates. Confirm the capital and lowercase Eng designs, including the requested capital alternatives through locl or stylistic sets, then verify that the generated fonts contain U+014A and U+014B.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.