diff --git a/runtime/ftplugin/go.vim b/runtime/ftplugin/go.vim
index 57fc73c..f3cae02 100644
--- a/runtime/ftplugin/go.vim
+++ b/runtime/ftplugin/go.vim
@@ -5,12 +5,16 @@
 " 2024 Jul 16 by Vim Project (add recommended indent style)
 " 2025 Mar 07 by Vim Project (add formatprg and keywordprg option #16804)
 " 2025 Mar 18 by Vim Project (use :term for 'keywordprg' #16911)
+" 2025 Apr 16 by Vim Project (set 'cpoptions' for line continuation, #17121)
 
 if exists('b:did_ftplugin')
   finish
 endif
 let b:did_ftplugin = 1
 
+let s:cpo_save = &cpo
+set cpo&vim
+
 setlocal formatoptions-=t
 setlocal formatprg=gofmt
 
@@ -45,4 +49,7 @@
   endfunc
 endif
 
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
 " vim: sw=2 sts=2 et
diff --git a/runtime/ftplugin/heex.vim b/runtime/ftplugin/heex.vim
index becc071..2f53d22 100644
--- a/runtime/ftplugin/heex.vim
+++ b/runtime/ftplugin/heex.vim
@@ -2,12 +2,16 @@
 " Language: HEEx
 " Maintainer:	Mitchell Hanberg <vimNOSPAM@mitchellhanberg.com>
 " Last Change: 2022 Sep 21
+" 2025 Apr 16 by Vim Project (set 'cpoptions' for line continuation, #17121)
 
 if exists("b:did_ftplugin")
   finish
 endif
 let b:did_ftplugin = 1
 
+let s:cpo_save = &cpo
+set cpo&vim
+
 setlocal shiftwidth=2 softtabstop=2 expandtab
 
 setlocal comments=:<%!--
@@ -25,3 +29,6 @@
 	\	      '<\@<=\([^/!][^ \t>]*\)[^>]*\%(>\|$\):<\@<=/\1>'
   let b:undo_ftplugin ..= " | unlet! b:match_ignorecase b:match_words"
 endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
diff --git a/runtime/ftplugin/lprolog.vim b/runtime/ftplugin/lprolog.vim
index 1075a9c..07ffc52 100644
--- a/runtime/ftplugin/lprolog.vim
+++ b/runtime/ftplugin/lprolog.vim
@@ -2,7 +2,9 @@
 " Language:     LambdaProlog (Teyjus)
 " Maintainer:   Markus Mottl  <markus.mottl@gmail.com>
 " URL:          http://www.ocaml.info/vim/ftplugin/lprolog.vim
-" Last Change:  2023 Aug 28 - added undo_ftplugin (Vim Project)
+" Last Change:  2025 Apr 16
+"               2025 Apr 16 - set 'cpoptions' for line continuation
+"               2023 Aug 28 - added undo_ftplugin (Vim Project)
 "               2006 Feb 05
 "               2001 Sep 16 - fixed 'no_mail_maps'-bug (MM)
 "               2001 Sep 02 - initial release  (MM)
@@ -12,6 +14,9 @@
   finish
 endif
 
+let s:cpo_save = &cpo
+set cpo&vim
+
 " Don't do other file type settings for this buffer
 let b:did_ftplugin = 1
 
@@ -43,3 +48,6 @@
   vnoremap <buffer> <Plug>BUncomOn <ESC>:'<,'><CR>`<O<ESC>0i/*<ESC>`>o<ESC>0i*/<ESC>`<
   vnoremap <buffer> <Plug>BUncomOff <ESC>:'<,'><CR>`<dd`>dd`<
 endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
diff --git a/runtime/ftplugin/mediawiki.vim b/runtime/ftplugin/mediawiki.vim
index 4618246..399de42 100644
--- a/runtime/ftplugin/mediawiki.vim
+++ b/runtime/ftplugin/mediawiki.vim
@@ -3,6 +3,7 @@
 " Home: http://en.wikipedia.org/wiki/Wikipedia:Text_editor_support#Vim
 " Last Change: 2024 Jul 14
 " Credits: chikamichi
+" 2025 Apr 16 by Vim Project (set 'cpoptions' for line continuation, #17121)
 "
 
 if exists("b:did_ftplugin")
@@ -10,6 +11,9 @@
 endif
 let b:did_ftplugin = 1
 
+let s:cpo_save = &cpo
+set cpo&vim
+
 " Many MediaWiki wikis prefer line breaks only at the end of paragraphs
 " (like in a text processor), which results in long, wrapping lines.
 setlocal wrap linebreak
@@ -40,3 +44,6 @@
 
 let b:undo_ftplugin = "setl commentstring< comments< formatoptions< foldexpr< foldmethod<"
 let b:undo_ftplugin += " matchpairs< linebreak< wrap< textwidth<"
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
diff --git a/runtime/ftplugin/mojo.vim b/runtime/ftplugin/mojo.vim
index ff50229..c7f3b6b 100644
--- a/runtime/ftplugin/mojo.vim
+++ b/runtime/ftplugin/mojo.vim
@@ -2,12 +2,16 @@
 " Language:	Mojo
 " Maintainer:	Riley Bruins <ribru17@gmail.com>
 " Last Change:	2024 Jul 07
+" 2025 Apr 16 by Vim Project (set 'cpoptions' for line continuation, #17121)
 
 if exists('b:did_ftplugin')
   finish
 endif
 let b:did_ftplugin = 1
 
+let s:cpo_save = &cpo
+set cpo&vim
+
 setlocal include=^\\s*\\(from\\\|import\\)
 setlocal define=^\\s*\\(\\(async\\s\\+\\)\\?def\\\|class\\)
 
@@ -39,3 +43,6 @@
       \ . '|setlocal suffixesadd<'
       \ . '|setlocal comments<'
       \ . '|setlocal commentstring<'
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
diff --git a/runtime/ftplugin/nroff.vim b/runtime/ftplugin/nroff.vim
index 7d3d2a5..1c6d4eb 100644
--- a/runtime/ftplugin/nroff.vim
+++ b/runtime/ftplugin/nroff.vim
@@ -7,12 +7,16 @@
 " Last Changes:
 "	2024 May 24 by Riley Bruins <ribru17@gmail.com> ('commentstring' #14843)
 "	2025 Feb 12 by Wu, Zhenyu <wuzhenyu@ustc.edu> (matchit configuration #16619)
+"	2025 Apr 16 by Eisuke Kawashima (cpoptions #17121)
 
 if exists("b:did_ftplugin")
   finish
 endif
 let b:did_ftplugin = 1
 
+let s:cpo_save = &cpo
+set cpo&vim
+
 setlocal commentstring=.\\\"\ %s
 setlocal comments=:.\\\"
 setlocal sections+=Sh
@@ -30,3 +34,6 @@
         \ . ',^\.\s*FS\>:^\.\s*FE\>'
   let b:undo_ftplugin .= "| unlet b:match_words"
 endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
diff --git a/runtime/ftplugin/tera.vim b/runtime/ftplugin/tera.vim
index 65bae70..ce4134a 100644
--- a/runtime/ftplugin/tera.vim
+++ b/runtime/ftplugin/tera.vim
@@ -2,12 +2,16 @@
 " Language:             Tera
 " Maintainer:           Muntasir Mahmud <muntasir.joypurhat@gmail.com>
 " Last Change:          2025 Mar 08
+" 2025 Apr 16 by Vim Project (set 'cpoptions' for line continuation, #17121)
 
 if exists("b:did_ftplugin")
   finish
 endif
 let b:did_ftplugin = 1
 
+let s:cpo_save = &cpo
+set cpo&vim
+
 setlocal autoindent
 
 setlocal commentstring={#\ %s\ #}
@@ -28,3 +32,6 @@
 let b:undo_ftplugin = "setlocal autoindent< commentstring< comments< " ..
       \ "includeexpr< suffixesadd< expandtab< shiftwidth< softtabstop<"
 let b:undo_ftplugin .= "|unlet! b:match_ignorecase b:match_words"
+
+let &cpo = s:cpo_save
+unlet s:cpo_save