[1] Layout Requirements シリーズ- JLREQ
- CLREQ
- ILREQ
- ALREQ
- Ethiopic Layout Requirements
- MLREQ
- Khmer Layout Requirements
- TLREQ
- Lao Layout Requirements
[2] Language enablement index, , https://w3c.github.io/typography/
[4] International text layout and typography index
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https://www.w3.org/TR/2017/WD-typography-20170209/