Add shy name (same as shy-latn)

Bug: T259360
Change-Id: Ieca724eceb0342c937ff3a2d64de61098b979412

languages/data/Names.php

@@ -402,6 +402,7 @@ class Names {
 		'shi-tfng' => 'ⵜⴰⵛⵍⵃⵉⵜ', # Tachelhit (Tifinagh script)
 		'shi-latn' => 'Taclḥit', # Tachelhit (Latin script)
 		'shn' => 'ၽႃႇသႃႇတႆး ', # Shan
+		'shy' => 'tacawit', # Shawiya (Multiple scripts - defaults to Latin)
 		'shy-latn' => 'tacawit', # Shawiya (Latin script) - T194047
 		'si' => 'සිංහල', # Sinhalese
 		'simple' => 'Simple English', # Simple English

languages/messages/MessagesShy.php

@@ -0,0 +1,13 @@
+<?php
+/** Shawiya (Tachawit)
+ *
+ * To improve a translation please visit https://translatewiki.net
+ *
+ * @ingroup Language
+ * @file
+ * @comment falls back to Shawiya (Latin)
+ *
+ * @author Amir E. Aharoni
+ */
+
+$fallback = 'shy-latn';