diff --git a/runtime/syntax/sh.vim b/runtime/syntax/sh.vim
index 41570cce4f..044f2a9e3e 100644
--- a/runtime/syntax/sh.vim
+++ b/runtime/syntax/sh.vim
@@ -3,30 +3,7 @@
 " Maintainer:		This runtime file is looking for a new maintainer.
 " Previous Maintainers:	Charles E. Campbell
 " 		Lennart Schultz <Lennart.Schultz@ecmwf.int>
-" Last Change:		2024 Mar 04 by Vim Project {{{1
-"		2024 Nov 03 by Aliaksei Budavei <0x000c70 AT gmail DOT com> improved bracket expressions, #15941
-"		2025 Jan 06 add $PS0 to bashSpecialVariables #16394
-"		2025 Jan 18 add bash coproc, remove duplicate syn keywords #16467
-"		2025 Mar 21 update shell capability detection #16939
-"		2025 Apr 03 command substitution opening paren at EOL #17026
-"		2025 Apr 10 improve shell detection #17084
-"		2025 Apr 29 match escaped chars in test operands #17221
-"		2025 May 06 improve single-quote string matching in parameter expansions
-"		2025 May 06 match KornShell compound arrays
-"		2025 May 10 improve wildcard character class lists
-"		2025 May 21 improve supported KornShell features
-"		2025 Jun 16 change how sh_fold_enabled is reset #17557
-"		2025 Jul 18 properly delete :commands #17785
-"		2025 Aug 23 bash: add support for ${ cmd;} and ${|cmd;} #18084
-"		2025 Sep 23 simplify ksh logic, update sh statements #18355
-"		2026 Jan 15 highlight command switches that contain a digit
-"		2026 Feb 11 improve support for KornShell function names and variables
-"		2026 Feb 15 improve comment handling #19414
-"		2026 Mar 23 improve matching of function definitions #19638
-"		2026 Apr 02 improve matching of function definitions #19849
-"		2026 Apr 19 improve detection of special variables #20016
-"		2026 May 14 don't highlight parens as part of the function name #20219
-" }}}
+" Last Change:		2026 May 17 by Vim Project
 " Version:		208
 " Former URL:		http://www.drchip.org/astronaut/vim/index.html#SYNTAX_SH
 " For options and settings, please use:      :help ft-sh-syntax
@@ -281,7 +258,7 @@ syn cluster shDerefList	contains=shDeref,shDerefSimple,shDerefVar,shDerefSpecial
 syn cluster shDerefVarList	contains=shDerefOffset,shDerefOp,shDerefVarArray,shDerefOpError
 syn cluster shEchoList	contains=shArithmetic,shBracketExpr,shCommandSub,shCommandSubBQ,shDerefVarArray,shSubshare,shValsub,shDeref,shDerefSimple,shEscape,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shCtrlSeq,shEchoQuote
 syn cluster shExprList1	contains=shBracketExpr,shNumber,shOperator,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shExpr,shDblBrace,shDeref,shDerefSimple,shCtrlSeq
-syn cluster shExprList2	contains=@shExprList1,@shCaseList,shTest
+syn cluster shExprList2	contains=@shExprList1,@shCaseList,shTest,shFunctionNameError
 syn cluster shFunctionCmds	contains=shFor,shCaseEsac,shIf,shRepeat,shDblBrace,shDblParen
 if exists("b:is_ksh88") || exists("b:is_mksh")
     " Offer "shFunctionCmds" as is.
@@ -307,7 +284,7 @@ if exists("b:is_kornshell") || exists("b:is_bash")
 endif
 syn cluster shPPSLeftList	contains=shAlias,shArithmetic,shBracketExpr,shCmdParenRegion,shCommandSub,shSubshare,shValsub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
 syn cluster shPPSRightList	contains=shDeref,shDerefSimple,shEscape,shPosnParm
-syn cluster shSubShList	contains=shBracketExpr,@shCommandSubList,shCommandSubBQ,shSubshare,shValsub,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq,shOperator
+syn cluster shSubShList	contains=shBracketExpr,@shCommandSubList,shCommandSubBQ,shSubshare,shValsub,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq,shOperator,shFunctionNameError
 syn cluster shTestList	contains=shArithmetic,shBracketExpr,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shSpecialDQ,shExDoubleQuote,shExpr,shExSingleQuote,shNumber,shOperator,shSingleQuote,shTest,shTestOpr
 syn cluster shNoZSList	contains=shSpecialNoZS
 syn cluster shForList	contains=shTestOpr,shNumber,shDerefSimple,shDeref,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shArithmetic
@@ -676,6 +653,12 @@ if exists("b:is_bash")
     syn match shFunctionTwo	"\%#=1\%(\%(\<\k\+\|[^()<>|&$;\t ]\+\)\+\)\@>\ze\s*\%(()\ze\)\=\_s*{"	contained skipwhite skipnl nextgroup=shFunctionExpr contains=shFunctionParens
     syn match shFunctionThree	"\%#=1^\s*\zs\%(\%(\<\k\+\|[^()<>|&$;\t ]\+\)\+\)\@>\s*()\ze\_s*((\@!"	skipwhite skipnl nextgroup=shFunctionSubSh contains=shFunctionParens
     syn match shFunctionFour	"\%#=1\%(\%(\<\k\+\|[^()<>|&$;\t ]\+\)\+\)\@>\ze\s*\%(\%(()\ze\)\=\)\@>\_s*((\@!"	contained skipwhite skipnl nextgroup=shFunctionSubSh contains=shFunctionParens
+    " Claim empty array assignments.
+    syn match shArrayEmptyDecl	"\%#=1\ze\%(\<\h\w*=\)\@>()"	transparent nextgroup=shVariable
+
+    if !exists("g:sh_no_error")
+        syn match shFunctionNameError	"\%#=1\%(\%(\<\h\w*\)\@>=\)\%(\%(\w\+\)\@>=\=\)\+()" skipwhite skipnl nextgroup=shExpr,shSubSh
+    endif
 elseif exists("b:is_ksh88")
     " AT&T ksh88
     syn match shFunctionCmdOne	"^\s*\zs\h\w*\s*()\ze\_s*\%(\%(for\|case\|select\|if\|while\|until\)\>\|\[\[\s\|((\)"	skipwhite skipnl nextgroup=@shFunctionCmds contains=shFunctionParens
@@ -970,6 +953,9 @@ if !exists("skip_sh_syntax_inits")
         hi def link shInError		Error
         hi def link shParenError		Error
         hi def link shTestError		Error
+        if exists("b:is_bash")
+            hi def link shFunctionNameError		Error
+        endif
         if exists("b:is_kornshell") || exists("b:is_posix")
             hi def link shDTestError		Error
         endif