Block request: Lisu

[jmcwilliams403]

• The requested characters are ...
  • [ ] Latin
  • [ ] Cyrillic
  • [ ] Greek
  • [ ] Punctuation
  • [ ] Diacritic / Mark
  • [ ] Symbol
• The requested characters are used in ...
  • [x] The alphabet / character set of a natural language.
  • [ ] The alphabet / character set of a constructed language.
  • [ ] The alphabet / character set of a transliteration or notation system.
  • [ ] Mathematical or other professional use in documents.
  • [ ] The symbol set of a programming language. For the languages that support using arbitrary symbols, please provide usages in well-known components or libraries.
  • [ ] The symbol set of a command-line program.
• [x] Some other monospace/programming fonts supported this character. Provide images below.

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The Lisu block contains letters for the Fraser script, comprised entirely of duplicates of capital Latin letters and turned variants thereof. Additionally, it contains duplicates of common Western punctuation for use as tone marks.

Originally, the Unicode consortium considered implementing the script by means of just adding the missing turned capital Latin letters to various Latin Extended blocks, but the semantic differences of each letter individually had ultimately got them to decide to create a whole new block including all the duplicate Latin letters.

ꓐ ꓑ ꓒ ꓓ ꓔ ꓕ ꓖ ꓗ ꓘ ꓙ ꓚ ꓛ ꓜ ꓝ ꓞ ꓟ
ꓠ ꓡ ꓢ ꓣ ꓤ ꓥ ꓦ ꓧ ꓨ ꓩ ꓪ ꓫ ꓬ ꓭ ꓮ ꓯ
ꓰ ꓱ ꓲ ꓳ ꓴ ꓵ ꓶ ꓷ ꓸ ꓹ ꓺ ꓻ ꓼ ꓽ ꓾ ꓿

Fairfax HD:

Everson Mono:

Additionally, there exists a Lisu Supplement block which consists of a single row and contains a single character:

𑾰

Fairfax HD:

[be5invis]

Lisu (Fraser script) is not Latin. They look similar but are different. Mark as far future.

[Logo121]

I suppose the only orthographic differences between Lisu script and the corresponding Latin letters they derive from are:

• They must be in San-serif (see https://www.evertype.com/standards/iso10646/pdf/fraser-sample.pdf), probably even for ꓲ.
• The letter ꓖ is usually using the "inward hook" form of G (or at least I haven't seen any samples otherwise)

Otherwise it seems to be safe to identify the glyph shapes with Latin script (using a subset of the variants or just 1 of them to be safe), unless there are plans otherwise to differentiate between them.