diff --git a/ext/js/language/aii/assyrian-neo-aramaic-text-preprocessors.js b/ext/js/language/aii/assyrian-neo-aramaic-text-preprocessors.js
new file mode 100644
index 0000000000..6d66f75794
--- /dev/null
+++ b/ext/js/language/aii/assyrian-neo-aramaic-text-preprocessors.js
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2024  Yomitan Authors
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import {basicTextProcessorOptions} from '../text-processors.js';
+
+const optionalDiacritics = ['\u0303', '\u0304', '\u0307', '\u0308', '\u0323', '\u032E', '\u0330', '\u0331', '\u0730', '\u0731', '\u0732', '\u0733', '\u0734', '\u0735', '\u0736', '\u0737', '\u0738', '\u0739', '\u073A', '\u073B', '\u073C', '\u073D', '\u073E', '\u073F', '\u0740', '\u0741', '\u0742', '\u0743', '\u0744', '\u0745', '\u0746', '\u0747', '\u0748', '\u0749', '\u074A'];
+
+const diacriticsRegex = new RegExp(`[${optionalDiacritics.join('')}]`, 'g');
+
+/** @type {import('language').TextProcessor<boolean>} */
+export const removeSyriacScriptDiacritics = {
+    name: 'Remove diacritics',
+    description: 'ܟܵܬܹܒ݂ ⬅️ ܟܬܒ',
+    options: basicTextProcessorOptions,
+    process: (text, setting) => {
+        return setting ? text.replace(diacriticsRegex, '') : text;
+    },
+};
diff --git a/ext/js/language/language-descriptors.js b/ext/js/language/language-descriptors.js
index 48d25b1d18..29ff551548 100644
--- a/ext/js/language/language-descriptors.js
+++ b/ext/js/language/language-descriptors.js
@@ -15,6 +15,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+import {removeSyriacScriptDiacritics} from './aii/assyrian-neo-aramaic-text-preprocessors.js';
 import {removeArabicScriptDiacritics} from './ar/arabic-text-preprocessors.js';
 import {normalizeRadicalCharacters} from './CJK-util.js';
 import {eszettPreprocessor} from './de/german-text-preprocessors.js';
@@ -58,6 +59,15 @@ const capitalizationPreprocessors = {
 
 /** @type {import('language-descriptors').LanguageDescriptorAny[]} */
 const languageDescriptors = [
+    {
+        iso: 'aii',
+        iso639_3: 'aii',
+        name: 'Assyrian Neo-Aramaic',
+        exampleText: 'ܟܵܬܹܒ݂',
+        textPreprocessors: {
+            removeSyriacScriptDiacritics,
+        },
+    },
     {
         iso: 'ar',
         iso639_3: 'ara',
diff --git a/types/ext/language-descriptors.d.ts b/types/ext/language-descriptors.d.ts
index 9a6aa30f7b..1de283b0b6 100644
--- a/types/ext/language-descriptors.d.ts
+++ b/types/ext/language-descriptors.d.ts
@@ -71,6 +71,11 @@ type AlphabeticDiacriticsProcessor = {
  * Any new language should be added to this object.
  */
 type AllTextProcessors = {
+    aii: {
+        pre: {
+            removeSyriacScriptDiacritics: TextProcessor<boolean>;
+        };
+    };
     ar: {
         pre: {
             removeArabicScriptDiacritics: TextProcessor<boolean>;