diff --git a/autotests/folding/test.py.fold b/autotests/folding/test.py.fold
--- a/autotests/folding/test.py.fold
+++ b/autotests/folding/test.py.fold
@@ -5,6 +5,9 @@
     ###
 <indentfold>    <endfold id='4'>'''</endfold id='4'>
 
+// alert check, no word delimiter check at start of word, bug 397719
+#TODO
+
 a = 100_000
 b = 856_264.65
 c = 0x420_F52
diff --git a/autotests/html/test.coffee.html b/autotests/html/test.coffee.html
--- a/autotests/html/test.coffee.html
+++ b/autotests/html/test.coffee.html
@@ -64,7 +64,7 @@
 timelineEvent<span style="font-weight:bold;">.</span>class
 
 <span style="color:#898887;"># Embedded JavaScript Code</span>
-markdown <span style="font-weight:bold;">=</span> <span style="color:#bf0303;background-color:#f7e6e6;font-weight:bold;font-style:italic;">`</span><span style="color:#0057ae;">function</span> () {
+markdown <span style="font-weight:bold;">=</span> <span style="color:#bf0303;background-color:#f7e6e6;font-weight:bold;font-style:italic;">`</span><span style="font-weight:bold;">function</span> () {
   <span style="font-weight:bold;">return</span> <span style="color:#bf0303;">\`In Markdown, write code like </span><span style="color:#3daee9;">\\\`</span><span style="color:#bf0303;">this</span><span style="color:#3daee9;">\\\`</span><span style="color:#bf0303;">\`</span><span style="font-weight:bold;">;</span>
 }<span style="color:#bf0303;background-color:#f7e6e6;font-weight:bold;font-style:italic;">`</span>
 
diff --git a/autotests/html/test.py.html b/autotests/html/test.py.html
--- a/autotests/html/test.py.html
+++ b/autotests/html/test.py.html
@@ -11,6 +11,9 @@
 <span style="color:#898887;">    </span><span style="color:#81ca2d;background-color:#f7e6e6;font-weight:bold;">###</span>
 <span style="color:#898887;">    '''</span>
 
+// alert check, no word delimiter check at start of word, bug <span style="color:#b08000;">397719</span>
+<span style="color:#898887;">#</span><span style="color:#ca9219;background-color:#451e1a;font-weight:bold;">TODO</span>
+
 a =<span style="color:#b08000;"> 100_000</span>
 b =<span style="color:#b08000;"> 856_264</span>.<span style="color:#b08000;">65</span>
 c =<span style="color:#b08000;"> 0x420_F52</span>
diff --git a/autotests/input/test.py b/autotests/input/test.py
--- a/autotests/input/test.py
+++ b/autotests/input/test.py
@@ -5,6 +5,9 @@
     ###
     '''
 
+// alert check, no word delimiter check at start of word, bug 397719
+#TODO
+
 a = 100_000
 b = 856_264.65
 c = 0x420_F52
diff --git a/autotests/reference/test.coffee.ref b/autotests/reference/test.coffee.ref
--- a/autotests/reference/test.coffee.ref
+++ b/autotests/reference/test.coffee.ref
@@ -58,7 +58,7 @@
 <Identifier>timelineEvent</Identifier><Symbol>.</Symbol><Identifier>class</Identifier><br/>
 <Normal></Normal><br/>
 <Comment># Embedded JavaScript Code</Comment><br/>
-<Identifier>markdown</Identifier><Normal> </Normal><Symbol>=</Symbol><Normal> </Normal><Javascript>`</Javascript><Object Member>function</Object Member><Normal Text> () </Normal Text><JavaScript Symbol>{</JavaScript Symbol><br/>
+<Identifier>markdown</Identifier><Normal> </Normal><Symbol>=</Symbol><Normal> </Normal><Javascript>`</Javascript><Keyword>function</Keyword><Normal Text> () </Normal Text><JavaScript Symbol>{</JavaScript Symbol><br/>
 <Normal>  </Normal><ControlFlow>return</ControlFlow><Normal> </Normal><JavaScript Template>\`In Markdown, write code like </JavaScript Template><Escape>\\\`</Escape><JavaScript Template>this</JavaScript Template><Escape>\\\`</Escape><JavaScript Template>\`</JavaScript Template><Symbol>;</Symbol><br/>
 <JavaScript Symbol>}</JavaScript Symbol><Javascript>`</Javascript><br/>
 <Normal></Normal><br/>
diff --git a/autotests/reference/test.py.ref b/autotests/reference/test.py.ref
--- a/autotests/reference/test.py.ref
+++ b/autotests/reference/test.py.ref
@@ -5,6 +5,9 @@
 <Comment>    </Comment><Alert Level 3>###</Alert Level 3><br/>
 <Comment>    '''</Comment><br/>
 <Normal Text></Normal Text><br/>
+<Operator>//</Operator><Normal Text> alert check, no word delimiter check at start of word, bug </Normal Text><Int>397719</Int><br/>
+<Comment>#</Comment><Alert Level 2>TODO</Alert Level 2><br/>
+<Normal Text></Normal Text><br/>
 <Normal Text>a </Normal Text><Operator>=</Operator><Int> 100_000</Int><br/>
 <Normal Text>b </Normal Text><Operator>=</Operator><Int> 856_264</Int><Normal Text>.</Normal Text><Int>65</Int><br/>
 <Normal Text>c </Normal Text><Operator>=</Operator><Hex> 0x420_F52</Hex><br/>
diff --git a/src/lib/rule.cpp b/src/lib/rule.cpp
--- a/src/lib/rule.cpp
+++ b/src/lib/rule.cpp
@@ -550,9 +550,6 @@
 
 MatchResult KeywordListRule::doMatch(const QString& text, int offset, const QStringList&)
 {
-    if (offset > 0 && !isWordDelimiter(text.at(offset - 1)))
-        return offset;
-
     if (m_keywordList.isEmpty()) {
         const auto def = definition();
         Q_ASSERT(def.isValid());