diff -ru ibus-typing-booster-2.1.0.orig/engine/itb_util.py ibus-typing-booster-2.1.0/engine/itb_util.py
--- ibus-typing-booster-2.1.0.orig/engine/itb_util.py	2018-07-24 08:43:58.000000000 +0200
+++ ibus-typing-booster-2.1.0/engine/itb_util.py	2023-10-09 18:24:53.617131025 +0200
@@ -1757,6 +1757,9 @@
     TR9> and its matching PDI or, if it has no matching PDI, the end of the
     TR9> paragraph
 
+    U+2069 POP DIRECTIONAL ISOLATE
+    U+2068 FIRST STRONG ISOLATE
+
     Examples:
 
     >>> is_right_to_left('Hallo!')
@@ -1765,16 +1768,16 @@
     >>> is_right_to_left('﷼')
     True
 
-    >>> is_right_to_left('⁨﷼⁩')
+    >>> is_right_to_left('\u2068﷼\u2069')
     False
 
-    >>> is_right_to_left('⁨﷼⁩﷼')
+    >>> is_right_to_left('\u2068﷼\u2069﷼')
     True
 
-    >>> is_right_to_left('a⁨﷼⁩﷼')
+    >>> is_right_to_left('a\u2068﷼\u2069﷼')
     False
 
-    >>> is_right_to_left('⁨a⁩⁨﷼⁩﷼')
+    >>> is_right_to_left('\u2068a\u2069⁨\u2068﷼\u2069﷼')
     True
     '''
     skip = False
@@ -1806,10 +1809,10 @@
     Examples:
 
     >>> bidi_embed('a')
-    '‪a‬'
+    '\u202Aa\u202C'
 
     >>> bidi_embed('﷼')
-    '‫﷼‬'
+    '\u202B﷼\u202C'
     '''
     if is_right_to_left(text):
         return chr(0x202B) + text + chr(0x202C) # RLE + text + PDF
ibus-typing-booster-2.1.0/engine のみに存在: itb_util.py.orig