Add language support

[deepakjois]

Issue by deepakjois
Friday May 19, 2017 at 10:50 GMT
Originally opened as deepakjois/luatex-harfbuzz#4

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[deepakjois]

Comment by khaledhosny
Saturday May 20, 2017 at 12:23 GMT

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I think this should use the hyphenation language by default, but there should also be a way to specify a language for shaping independent of hyphenation language for the case you want OpenType features for a specific language and hyphenation for another e.g. if the text is in Macedonian but the font has only Serbian language, one will want to use Macedonian hyphenation but shape the font with Serbian language which will provide localized glyph alternates suitable for Macedonian (this example might not be exactly correct, but the general idea exists).