Add language-environment and input methods for Syriac

* lisp/leim/quail/syriac.el: New file
* lisp/language/misc-lang.el: ("Syriac"): New language environment.
("Arabic"): Add comment explaining usage of `arabic-shape-gstring'
for Syriac as well as Arabic.
* etc/NEWS: Announce the new language environment and input methods.
* etc/HELLO: Add a Syriac greeting.
(Bug#80451)

etc/HELLO

@@ -12,7 +12,7 @@ Non-ASCII examples:
   Europe: <x-charset><param>latin-iso8859-1</param>¡Hola!, Grüß Gott, Hyvää päivää,</x-charset> Tere õhtust,<x-charset><param>latin-iso8859-3</param> Bonġu
           Cześć!,</x-charset><x-charset><param>latin-iso8859-2</param> Dobrý den,</x-charset><x-charset><param>cyrillic-iso8859-5</param> Здравствуйте!,</x-charset><x-charset><param>greek-iso8859-7</param> Γειά σας,</x-charset> გამარჯობა
   Africa: <x-charset><param>ethiopic</param>ሠላም</x-charset>
-  Middle/Near East:<x-charset><param>hebrew-iso8859-8</param> שָׁלוֹם,</x-charset> السّلام عليكم
+  Middle/Near East:<x-charset><param>hebrew-iso8859-8</param> שָׁלוֹם,</x-charset> السّلام عليكم, ܣܠܡܐ
   South Asia: નમસ્તે, नमस्ते, ನಮಸ್ಕಾರ, നമസ്കാരം, ନମସ୍କାର,
               ආයුබෝවන්, வணக்கம், నమస్కారం,<x-charset><param>tibetan</param> བཀྲ་ཤིས་བདེ་ལེགས༎</x-charset>
   South East Asia: ជំរាបសួរ,<x-charset><param>lao</param> ສະບາຍດີ,</x-charset> မင်္ဂလာပါ,<x-charset><param>thai-tis620</param> สวัสดีครับ,</x-charset><x-charset><param>vietnamese-viscii-lower</param> </x-charset><x-charset><param>vietnamese-viscii-upper</param>C</x-charset><x-charset><param>vietnamese-viscii-lower</param>hào bạn</x-charset>
@@ -107,6 +107,7 @@ Spanish (español)	¡Hola!
 Sundanese (ᮃᮊ᮪ᮟᮛᮞᮥᮔ᮪ᮓ)	ᮞᮙ᮪ᮕᮥᮛᮞᮥᮔ᮪
 Swedish (svenska)	Hej / Goddag / Hallå
 Syloti Nagri (ꠍꠤꠟꠐꠤ ꠘꠣꠉꠞꠤ)	ꠀꠌ꠆ꠍꠣꠟꠣꠝꠥ ꠀꠟꠣꠁꠇꠥꠝ / ꠘꠝꠡ꠆ꠇꠣꠞ
+Syriac (ܣܘܪܝܝܐ)	ܫܠܡܐ
 Tamil (தமிழ்)	வணக்கம்
 Telugu (తెలుగు)	నమస్కారం
 Tagalog (ᜊᜌ᜔ᜊᜌᜒᜈ᜔)	ᜃᜓᜋᜓᜐ᜔ᜆ

etc/NEWS

@@ -819,6 +819,11 @@ writing in the orthographies of the six languages simultaneously.
 *** New input methods for languages based on Burmese.
 These include: Burmese, Burmese (visual order), Shan, and Mon.
 
+---
+*** New input methods for Syriac languages.
+Language environment and input methods are implemented now for languages
+using the Syriac script: Syriac and Syriac (phonetic)
+
 ---
 ** 'visual-wrap-prefix-mode' now supports variable-pitch fonts.
 When using 'visual-wrap-prefix-mode' in buffers with variable-pitch

lisp/language/misc-lang.el

@@ -135,6 +135,9 @@ thin (i.e. 1-dot width) space."
     (error (push err arabic-shape-log)))
   gstring)
 
+;;; `arabic-shape-gstring' is used for shaping of Arabic (range
+;;; #x600–#x6ff) and Syriac (range #x700–#x74f) on account of their
+;;; identical shaping requirements.
 (set-char-table-range
  composition-function-table
  '(#x600 . #x74F)
@@ -146,6 +149,20 @@ thin (i.e. 1-dot width) space."
   (list (vector "[\u200C\u200D][\u0600-\u074F\u200C\u200D]+"
                 0 #'arabic-shape-gstring)))
 
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Syriac
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(set-language-info-alist
+ "Syriac" '((charset unicode)
+            (coding-system utf-8)
+            (coding-priority utf-8)
+            (input-method . "syriac")
+            (sample-text . "Syriac	ܫܠܡܐ")
+            (documentation . "\
+Language environment for Classical Syriac, Aramaic, and other languages
+using the Syriac script.")))
+
 ;; The Egyptian Hieroglyph Format Controls were introduced in Unicode
 ;; Standard v12.0.  Apparently, they are not yet well supported in
 ;; existing fonts, as of late 2020.  But there's no reason for us not

lisp/leim/quail/syriac.el

@@ -0,0 +1,236 @@
+;;; syriac.el --- Quail package for inputting Syriac	-*- coding: utf-8; lexical-binding:t -*-
+
+;; Copyright (C) 2026 Free Software Foundation, Inc.
+
+;; Author: Lee Thompson <lee.p.thomp@gmail.com>
+;; Keywords: multilingual, input method, Syriac
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'quail)
+
+(quail-define-package
+ "syriac" "Syriac" "ܣ" nil "Syriac input method.
+
+Based on Syriac table in X Keyboard Configuration DB
+" nil t t t t nil nil nil nil nil t)
+
+;;  ܏̮ 1! 2̊ 3̥ 4݉ 5♰ 6♱ 7܊ 8» 9) 0( -« =+
+;;      ܔܰ ܨܳ ܖܶ ܩܺ ܦܽ ܜ݀ ܥ݁ ܗ̈ ܞ̄ ܚ̇ ܓ̃ ܕ݊ <>
+;;       ܫܱ ܣܴ ܝܷ ܒܻ ܠܾ ܐܑ ܬـ ܢ̤ ܡ̱ ܟ̣ ܛ̰ ܆:
+;;        ]ܲ [ܵ ܤܸ ܪܼ ܧܿ ܀ܹ .݂ ܘ، ܙ؛ ܇؟
+;;
+
+(quail-define-rules
+ ("`" ?܏)
+ ("~" ?̮)
+
+ ("!" ?!)
+ ("@" ?̊)
+ ("#" ?̥)
+ ("$" ?݉)
+ ("%" ?♰)
+ ("^" ?♱)
+ ("&" ?܊)
+ ("*" ?»)
+ ("(" ?\))
+ (")" ?\()
+ ("_" ?«)
+ ("+" ?+)
+
+ ("Q" ?ܰ)
+ ("W" ?ܳ)
+ ("E" ?ܶ)
+ ("R" ?ܺ)
+ ("T" ?ܽ)
+ ("Y" ?݀)
+ ("U" ?݁)
+ ("I" ?̈)
+ ("O" ?̄)
+ ("P" ?̇)
+ ("{" ?̃)
+ ("}" ?݊)
+
+ ("A" ?ܱ)
+ ("S" ?ܴ)
+ ("D" ?ܷ)
+ ("F" ?ܻ )
+ ("G" ?ܾ)
+ ("H" ?ܑ)
+ ("J" ?ـ)
+ ("K" ?̤)
+ ("L" ?̱)
+ (":" ?̣)
+ ("\"" ?̰)
+ ("|" ?:)
+
+
+ ("Z" ?ܲ)
+ ("X" ?ܵ)
+ ("C" ?ܸ)
+ ("V" ?ܼ)
+ ("B" ?ܿ)
+ ("N" ?ܹ)
+ ("M" ?݂)
+ ("<" ?،)
+ (">" ?؛)
+ ("?" ?؟)
+
+ ("q" ?ܔ)
+ ("w" ?ܨ)
+ ("e" ?ܖ)
+ ("r" ?ܩ)
+ ("t" ?ܦ)
+ ("y" ?ܜ)
+ ("u" ?ܥ)
+ ("i" ?ܗ)
+ ("o" ?ܞ)
+ ("p" ?ܚ)
+ ("[" ?ܓ)
+ ("]" ?ܕ)
+
+ ("a" ?ܫ)
+ ("s" ?ܣ)
+ ("d" ?ܝ)
+ ("f" ?ܒ)
+ ("g" ?ܠ)
+ ("h" ?ܐ)
+ ("j" ?ܬ)
+ ("k" ?ܢ)
+ ("l" ?ܡ)
+ (";" ?ܟ)
+ ("'" ?ܛ)
+ ("\\" ?܆)
+
+ ("z" ?\])
+ ("x" ?\[)
+ ("c" ?ܤ)
+ ("v" ?ܪ)
+ ("b" ?ܧ)
+ ("n" ?܀)
+ ("m" ?.)
+ ("," ?ܘ)
+ ("." ?ܙ)
+ ("/" ?܇))
+
+(quail-define-package
+ "syriac-phonetic" "Syriac" "ܦ" nil "Phonetic input method for Syriac.
+
+Based on Syriac (phonetic) table in X Keyboard Configuration DB
+" nil t t t t nil nil nil nil nil t)
+
+;;  ܏̮ 1! 2̊ 3̥ 4݉ 5♰ 6♱ 7܊ 8» 9) 0( -« =+
+;;     ܩܰ ܘܳ ܖܶ ܪܺ ܬܽ ܝ݀ ܜ݁ ܥ̈ ܧ̄ ܦ̇ ]̃ [݊
+;;      ܐܱ ܣܴ ܕܷ ܔܻ ܓܾ ܗܑ ܛـ ܟ̤ ܠ̱ ܚ̣ ܞ̰ ܆:
+;;       ܙܲ ܨܵ ܤܸ ܫܼ ܒܿ ܢܹ ܡ݂ ܀، .؛ ܇؟
+
+(quail-define-rules
+ ("`" ?܏)
+ ("~" ?̮)
+
+ ("!" ?!)
+ ("@" ?̊)
+ ("#" ?̥)
+ ("$" ?݉)
+ ("%" ?♰)
+ ("^" ?♱)
+ ("&" ?܊)
+ ("*" ?»)
+ ("(" ?\))
+ (")" ?\()
+ ("_" ?«)
+ ("+" ?+)
+
+ ("Q" ?ܰ)
+ ("W" ?ܳ)
+ ("E" ?ܶ)
+ ("R" ?ܺ)
+ ("T" ?ܽ)
+ ("Y" ?݀)
+ ("U" ?݁)
+ ("I" ?̈)
+ ("O" ?̄)
+ ("P" ?̇)
+ ("{" ?̃)
+ ("}" ?݊)
+
+ ("A" ?ܱ)
+ ("S" ?ܴ)
+ ("D" ?ܷ)
+ ("F" ?ܻ)
+ ("G" ?ܾ)
+ ("H" ?ܑ)
+ ("J" ?ـ)
+ ("K" ?̤)
+ ("L" ?̱)
+ (":" ?̣)
+ ("\"" ?̰)
+ ("|" ?:)
+
+ ("Z" ?ܲ)
+ ("X" ?ܵ)
+ ("C" ?ܸ)
+ ("V" ?ܼ)
+ ("B" ?ܿ)
+ ("N" ?ܹ)
+ ("M" ?݂)
+ ("<" ?،)
+ (">" ?؛)
+ ("?" ?؟)
+
+ ("q" ?ܩ)
+ ("w" ?ܘ)
+ ("e" ?ܖ)
+ ("r" ?ܪ)
+ ("t" ?ܬ)
+ ("y" ?ܝ)
+ ("u" ?ܜ)
+ ("i" ?ܥ)
+ ("o" ?ܧ)
+ ("p" ?ܦ)
+ ("[" ?\])
+ ("]" ?\[)
+
+ ("a" ?ܐ)
+ ("s" ?ܣ)
+ ("d" ?ܕ)
+ ("f" ?ܔ)
+ ("g" ?ܓ)
+ ("h" ?ܗ)
+ ("j" ?ܛ)
+ ("k" ?ܟ)
+ ("l" ?ܠ)
+ (";" ?ܚ)
+ ("\\" ?܆)
+ ("'" ?ܞ)
+
+ ("z" ?ܙ)
+ ("x" ?ܨ)
+ ("c" ?ܤ)
+ ("v" ?ܫ)
+ ("b" ?ܒ)
+ ("n" ?ܢ)
+ ("m" ?ܡ)
+ ("," ?܀)
+ ("." ?.)
+ ("/" ?܇)
+ )
+
+;;; syriac.el ends here