For problems related to letter-shaping or text direction, check Bidi.

Date conversion:

• greg2hijri: tex se, babel

Typesetting

• See: Arabic LaTeX
• Block ligation
• Pandoc Typography
• Hindu-Arabic numerals
• Quotation i18n:
• freeserif Arabic font issues

Search and Regex

• grepping diacritics
• Characters in (U+FE8D to U+FEEF) should be considered uppercase Arabic characters. Example:

1echo ﺏﺡﺭ | grep -i 'ب'

Arabic typesetting:

Editors

Vim

• misalignment when notermbidi
• termbidi autodetection
  • ncurses support for Bidi capability
• Extra-wide characters
• Fold
• set termbidi rightleft rendering problem
• Vertical windows

UBA

• W3C standard
• Panodc
• Babel
• Libreoffice
• Hugo

Combining characters

• Commands like tr '[:upper:]' '[:lower:]' use the current locale to determine uppercase/lowercase equivalents. But it doesn’t work for Arabic.
• grep: same problem.

Arabic keyboard

• CapsLock affect: print “capital” Arabic characters starting from (U+FE8D).
• Third level Ein letter: ؏ (U+060F). Currently prints ع with no change.
• 2nd level Haa: (U+06BE) for Hijri dates.
• 3rd level asterisk: (U+06DE)
• 3rd level parenthesis: U+FD3E, U+FD3F

See also:

• Unicode