diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 6715f65..5abc4e9 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -5304,6 +5304,14 @@
 	command is given.  If the Normal group colors are changed later, the
 	"fg" and "bg" colors will not be adjusted.
 
+ctermfont={font-nr}				*highlight-ctermfont*
+	This gives the alternative font number to use in the terminal. The
+	available fonts depend on the terminal, and if the terminal is not set
+	up for alternative fonts this simply won't do anything. The range of
+	{font-nr} is 0-10 where 0 resets the font to the default font, 1-9
+	selects one of the 9 alternate fonts, and 10 selects the Fraktur font.
+	For more information see your terminal's handling of SGR parameters
+	10-20. |t_CF|
 
 3. highlight arguments for the GUI
 
diff --git a/runtime/doc/tags b/runtime/doc/tags
index 8851860..d7eb1dd 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -7947,6 +7947,7 @@
 highlight-cterm	syntax.txt	/*highlight-cterm*
 highlight-ctermbg	syntax.txt	/*highlight-ctermbg*
 highlight-ctermfg	syntax.txt	/*highlight-ctermfg*
+highlight-ctermfont	syntax.txt	/*highlight-ctermfont*
 highlight-ctermul	syntax.txt	/*highlight-ctermul*
 highlight-default	syntax.txt	/*highlight-default*
 highlight-font	syntax.txt	/*highlight-font*
diff --git a/runtime/doc/term.txt b/runtime/doc/term.txt
index 546b0bf..8154ec5 100644
--- a/runtime/doc/term.txt
+++ b/runtime/doc/term.txt
@@ -1,4 +1,4 @@
-*term.txt*      For Vim version 9.1.  Last change: 2023 Dec 09
+*term.txt*      For Vim version 9.1.  Last change: 2024 Jan 15
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -448,6 +448,7 @@
 	t_AU	set underline color (ANSI)			*t_AU* *'t_AU'*
 	t_Ce	undercurl and underline end			*t_Ce* *'t_Ce'*
 	t_Cs	undercurl (curly underline) mode		*t_Cs* *'t_Cs'*
+	t_CF	set alternate font (using index 0 - 10)		*t_CF* *'t_CF'*
 	t_Us	double underline mode				*t_Us* *'t_Us'*
 	t_ds	dotted underline mode				*t_ds* *'t_ds'*
 	t_Ds	dashed underline mode				*t_Ds* *'t_Ds'*
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index 12e6f34..ceeb3db 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -9,6 +9,7 @@
 " 	2023 Dec 21 by Vim Project (improve ex command matching)
 " 	2023 Dec 30 by Vim Project (:syntax improvements)
 " 	2024 Jan 14 by Vim Project (TermResponseAll autocommand)
+" 	2024 Jan 15 by Vim Project (:hi ctermfont attribute)
 " Version:	9.0-25
 " URL:	http://www.drchip.org/astronaut/vim/index.html#SYNTAX_VIM
 " Automatically generated keyword lists: {{{1
@@ -663,7 +664,7 @@
 syn match	vimHiGuiRgb	contained	"#\x\{6}"
 
 " Highlighting: hi group key=arg ... {{{2
-syn cluster	vimHiCluster contains=vimGroup,vimHiGroup,vimHiTerm,vimHiCTerm,vimHiStartStop,vimHiCtermFgBg,vimHiCtermul,vimHiGui,vimHiGuiFont,vimHiGuiFgBg,vimHiKeyError,vimNotation
+syn cluster	vimHiCluster contains=vimGroup,vimHiGroup,vimHiTerm,vimHiCTerm,vimHiStartStop,vimHiCtermFgBg,vimHiCtermul,vimHiCtermfont,vimHiGui,vimHiGuiFont,vimHiGuiFgBg,vimHiKeyError,vimNotation
 syn region	vimHiKeyList	contained oneline start="\i\+" skip="\\\\\|\\|" end="$\||"	contains=@vimHiCluster
 if !exists("g:vimsyn_noerror") && !exists("g:vimsyn_vimhikeyerror")
  syn match	vimHiKeyError	contained	"\i\+="he=e-1
@@ -673,6 +674,7 @@
 syn match	vimHiCTerm	contained	"\ccterm="he=e-1		nextgroup=vimHiAttribList
 syn match	vimHiCtermFgBg	contained	"\ccterm[fb]g="he=e-1	nextgroup=vimHiNmbr,vimHiCtermColor,vimFgBgAttrib,vimHiCtermError
 syn match	vimHiCtermul	contained	"\cctermul="he=e-1	nextgroup=vimHiNmbr,vimHiCtermColor,vimFgBgAttrib,vimHiCtermError
+syn match	vimHiCtermfont	contained	"\cctermfont="he=e-1	nextgroup=vimHiNmbr,vimHiCtermColor,vimFgBgAttrib,vimHiCtermError
 syn match	vimHiGui	contained	"\cgui="he=e-1		nextgroup=vimHiAttribList
 syn match	vimHiGuiFont	contained	"\cfont="he=e-1		nextgroup=vimHiFontname
 syn match	vimHiGuiFgBg	contained	"\cgui\%([fb]g\|sp\)="he=e-1	nextgroup=vimHiGroup,vimHiGuiFontname,vimHiGuiRgb,vimFgBgAttrib
@@ -951,6 +953,7 @@
  hi def link vimFgBgAttrib	vimHiAttrib
  hi def link vimFuncEcho	vimCommand
  hi def link vimHiCtermul	vimHiTerm
+ hi def link vimHiCtermfont	vimHiTerm
  hi def link vimFold	Folded
  hi def link vimFor	vimCommand
  hi def link vimFTCmd	vimCommand
diff --git a/src/highlight.c b/src/highlight.c
index 318564c..3381208 100644
--- a/src/highlight.c
+++ b/src/highlight.c
@@ -59,6 +59,7 @@
     int		sg_cterm_bg;	// terminal bg color number + 1
     int		sg_cterm_ul;	// terminal ul color number + 1
     int		sg_cterm_attr;	// Screen attr for color term mode
+    int		sg_cterm_font;	// terminal alternative font (0 for normal)
 // for when using the GUI
 #if defined(FEAT_GUI) || defined(FEAT_TERMGUICOLORS)
     guicolor_T	sg_gui_fg;	// GUI foreground color handle
@@ -1035,6 +1036,39 @@
 }
 
 /*
+ * Set the cterm font for the highlight group at 'idx'.
+ * 'arg' is the color name or the numeric value as a string.
+ * 'init' is set to TRUE when initializing highlighting.
+ * Called for the ":highlight" command and the "hlset()" function.
+ *
+ * Returns TRUE if the font is set.
+ */
+    static int
+highlight_set_cterm_font(
+	int	idx,
+	char_u	*arg,
+	int	init)
+{
+    int		font;
+
+    if (init && (HL_TABLE()[idx].sg_set & SG_CTERM))
+	return FALSE;
+
+    if (!init)
+	HL_TABLE()[idx].sg_set |= SG_CTERM;
+
+    if (VIM_ISDIGIT(*arg))
+	font = atoi((char *)arg);
+    else if (STRICMP(arg, "NONE") == 0)
+	font = -1;
+    else
+	return FALSE;
+
+    HL_TABLE()[idx].sg_cterm_font = font + 1;
+    return TRUE;
+}
+
+/*
  * Set the cterm fg/bg/ul color for the highlight group at 'idx'.
  * 'key' is one of 'CTERMFG' or 'CTERMBG' or 'CTERMUL'.
  * 'keystart' is the color name/value.
@@ -1679,6 +1713,14 @@
 		    break;
 		}
 	    }
+	    else if (STRCMP(key, "CTERMFONT") == 0)
+	    {
+		if (!highlight_set_cterm_font(idx, arg, init))
+		{
+		    error = TRUE;
+		    break;
+		}
+	    }
 	    else if (STRCMP(key, "GUIFG") == 0)
 	    {
 #if defined(FEAT_GUI) || defined(FEAT_EVAL)
@@ -1865,6 +1907,7 @@
 	    || HL_TABLE()[idx].sg_cterm_attr != 0
 	    || HL_TABLE()[idx].sg_cterm_fg != 0
 	    || HL_TABLE()[idx].sg_cterm_bg != 0
+	    || HL_TABLE()[idx].sg_cterm_font != 0
 #ifdef FEAT_GUI
 	    || HL_TABLE()[idx].sg_gui_attr != 0
 	    || HL_TABLE()[idx].sg_gui_fg_name != NULL
@@ -1892,6 +1935,7 @@
     HL_TABLE()[idx].sg_cterm_fg = 0;
     HL_TABLE()[idx].sg_cterm_bg = 0;
     HL_TABLE()[idx].sg_cterm_attr = 0;
+    HL_TABLE()[idx].sg_cterm_font = 0;
 #if defined(FEAT_GUI) || defined(FEAT_EVAL)
     HL_TABLE()[idx].sg_gui = 0;
     VIM_CLEAR(HL_TABLE()[idx].sg_gui_fg_name);
@@ -2539,6 +2583,8 @@
 						  == taep->ae_u.cterm.bg_color
 			    && aep->ae_u.cterm.ul_color
 						  == taep->ae_u.cterm.ul_color
+			    && aep->ae_u.cterm.font
+						  == taep->ae_u.cterm.font
 #ifdef FEAT_TERMGUICOLORS
 			    && aep->ae_u.cterm.fg_rgb
 						    == taep->ae_u.cterm.fg_rgb
@@ -2609,6 +2655,7 @@
 	taep->ae_u.cterm.fg_color = aep->ae_u.cterm.fg_color;
 	taep->ae_u.cterm.bg_color = aep->ae_u.cterm.bg_color;
 	taep->ae_u.cterm.ul_color = aep->ae_u.cterm.ul_color;
+	taep->ae_u.cterm.font = aep->ae_u.cterm.font;
 #ifdef FEAT_TERMGUICOLORS
 	taep->ae_u.cterm.fg_rgb = aep->ae_u.cterm.fg_rgb;
 	taep->ae_u.cterm.bg_rgb = aep->ae_u.cterm.bg_rgb;
@@ -2639,6 +2686,7 @@
     at_en.ae_u.cterm.fg_color = fg;
     at_en.ae_u.cterm.bg_color = bg;
     at_en.ae_u.cterm.ul_color = 0;
+    at_en.ae_u.cterm.font = 0;
     return get_attr_entry(&cterm_attr_table, &at_en);
 }
 #endif
@@ -2809,6 +2857,8 @@
 		    new_en.ae_u.cterm.bg_color = prim_aep->ae_u.cterm.bg_color;
 		if (prim_aep->ae_u.cterm.ul_color > 0)
 		    new_en.ae_u.cterm.ul_color = prim_aep->ae_u.cterm.ul_color;
+		if (prim_aep->ae_u.cterm.font > 0)
+		    new_en.ae_u.cterm.font = prim_aep->ae_u.cterm.font;
 #ifdef FEAT_TERMGUICOLORS
 		// If both fg and bg are not set fall back to cterm colors.
 		// Helps for SpellBad which uses undercurl in the GUI.
@@ -2948,6 +2998,8 @@
 				    sgp->sg_cterm_bg, NULL, "ctermbg");
     didh = highlight_list_arg(id, didh, LIST_INT,
 				    sgp->sg_cterm_ul, NULL, "ctermul");
+    didh = highlight_list_arg(id, didh, LIST_INT,
+				    sgp->sg_cterm_font, NULL, "ctermfont");
 
 #if defined(FEAT_GUI) || defined(FEAT_EVAL)
     didh = highlight_list_arg(id, didh, LIST_ATTR,
@@ -3138,7 +3190,7 @@
 	    return (HL_TABLE()[id - 1].sg_gui_sp_name);
 	return (HL_TABLE()[id - 1].sg_gui_bg_name);
     }
-    if (font || sp)
+    if (sp)
 	return NULL;
     if (modec == 'c')
     {
@@ -3146,6 +3198,8 @@
 	    n = HL_TABLE()[id - 1].sg_cterm_fg - 1;
 	else if (ul)
 	    n = HL_TABLE()[id - 1].sg_cterm_ul - 1;
+	else if (font)
+	    n = HL_TABLE()[id - 1].sg_cterm_font - 1;
 	else
 	    n = HL_TABLE()[id - 1].sg_cterm_bg - 1;
 	if (n < 0)
@@ -3296,7 +3350,8 @@
 
     // For the color term mode: If there are other than "normal"
     // highlighting attributes, need to allocate an attr number.
-    if (sgp->sg_cterm_fg == 0 && sgp->sg_cterm_bg == 0 && sgp->sg_cterm_ul == 0
+    if (sgp->sg_cterm_fg == 0 && sgp->sg_cterm_bg == 0 &&
+	sgp->sg_cterm_ul == 0 && sgp->sg_cterm_font == 0
 # ifdef FEAT_TERMGUICOLORS
 	    && sgp->sg_gui_fg == INVALCOLOR
 	    && sgp->sg_gui_bg == INVALCOLOR
@@ -3310,6 +3365,7 @@
 	at_en.ae_u.cterm.fg_color = sgp->sg_cterm_fg;
 	at_en.ae_u.cterm.bg_color = sgp->sg_cterm_bg;
 	at_en.ae_u.cterm.ul_color = sgp->sg_cterm_ul;
+	at_en.ae_u.cterm.font = sgp->sg_cterm_font;
 # ifdef FEAT_TERMGUICOLORS
 	at_en.ae_u.cterm.fg_rgb = GUI_MCH_GET_RGB2(sgp->sg_gui_fg);
 	at_en.ae_u.cterm.bg_rgb = GUI_MCH_GET_RGB2(sgp->sg_gui_bg);
@@ -3717,6 +3773,8 @@
 	hlt[hlcnt + i].sg_cterm_fg = hlt[id - 1].sg_cterm_fg;
     if (hlt[id - 1].sg_cterm_bg != hlt[id_S - 1].sg_cterm_bg)
 	hlt[hlcnt + i].sg_cterm_bg = hlt[id - 1].sg_cterm_bg;
+    if (hlt[id - 1].sg_cterm_font != hlt[id_S - 1].sg_cterm_font)
+	hlt[hlcnt + i].sg_cterm_font = hlt[id - 1].sg_cterm_font;
 #  if defined(FEAT_GUI) || defined(FEAT_EVAL)
     hlt[hlcnt + i].sg_gui ^=
 	hlt[id - 1].sg_gui ^ hlt[id_S - 1].sg_gui;
@@ -4180,6 +4238,10 @@
 	if (dict_add_string(dict, "ctermul",
 			highlight_color(hlgid, (char_u *)"ul", 'c')) == FAIL)
 	    goto error;
+    if (sgp->sg_cterm_font != 0)
+	if (dict_add_string(dict, "ctermfont",
+			highlight_color(hlgid, (char_u *)"font", 'c')) == FAIL)
+	    goto error;
     if (sgp->sg_gui != 0)
     {
 	attr_dict = highlight_get_attr_dict(sgp->sg_gui);
@@ -4408,6 +4470,7 @@
     char_u	*ctermfg;
     char_u	*ctermbg;
     char_u	*ctermul;
+    char_u	*ctermfont;
     char_u	*guifg;
     char_u	*guibg;
     char_u	*guisp;
@@ -4492,6 +4555,10 @@
     if (error)
 	return FALSE;
 
+    ctermfont = hldict_get_string(dict, (char_u *)"ctermfont", &error);
+    if (error)
+	return FALSE;
+
     if (!hldict_attr_to_str(dict, (char_u *)"gui", gui_attr, sizeof(gui_attr)))
 	return FALSE;
 
@@ -4516,7 +4583,7 @@
     // If none of the attributes are specified, then do nothing.
     if (term_attr[0] == NUL && start == NULL && stop == NULL
 	    && cterm_attr[0] == NUL && ctermfg == NULL && ctermbg == NULL
-	    && ctermul == NULL && gui_attr[0] == NUL
+	    && ctermul == NULL && ctermfont == NULL && gui_attr[0] == NUL
 # ifdef FEAT_GUI
 	    && font == NULL
 # endif
@@ -4536,6 +4603,7 @@
     p = add_attr_and_value(p, (char_u *)" ctermfg=", 9, ctermfg);
     p = add_attr_and_value(p, (char_u *)" ctermbg=", 9, ctermbg);
     p = add_attr_and_value(p, (char_u *)" ctermul=", 9, ctermul);
+    p = add_attr_and_value(p, (char_u *)" ctermfont=", 9, ctermfont);
     p = add_attr_and_value(p, (char_u *)" gui=", 5, gui_attr);
 # ifdef FEAT_GUI
     p = add_attr_and_value(p, (char_u *)" font=", 6, font);
diff --git a/src/optiondefs.h b/src/optiondefs.h
index 783b851..5fa8f37 100644
--- a/src/optiondefs.h
+++ b/src/optiondefs.h
@@ -2931,6 +2931,7 @@
     p_term("t_cd", T_CD)
     p_term("t_ce", T_CE)
     p_term("t_Ce", T_UCE)
+    p_term("t_CF", T_CFO)
     p_term("t_cl", T_CL)
     p_term("t_cm", T_CM)
     p_term("t_Co", T_CCO)
diff --git a/src/proto/term.pro b/src/proto/term.pro
index b83df86..d82f906 100644
--- a/src/proto/term.pro
+++ b/src/proto/term.pro
@@ -33,6 +33,7 @@
 void term_fg_color(int n);
 void term_bg_color(int n);
 void term_ul_color(int n);
+void term_font(int n);
 char_u *term_bg_default(void);
 void term_fg_rgb_color(guicolor_T rgb);
 void term_bg_rgb_color(guicolor_T rgb);
diff --git a/src/screen.c b/src/screen.c
index ac24a16..ef43cfc 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -1667,6 +1667,8 @@
      */
     if (aep != NULL)
     {
+	if (aep->ae_u.cterm.font > 0 && aep->ae_u.cterm.font < 12)
+		term_font(aep->ae_u.cterm.font);
 #ifdef FEAT_TERMGUICOLORS
 	// When 'termguicolors' is set but fg or bg is unset,
 	// fall back to the cterm colors.   This helps for SpellBad,
diff --git a/src/structs.h b/src/structs.h
index 85f440d..da8c2e2 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1186,6 +1186,7 @@
 	    short_u	    fg_color;	// foreground color number
 	    short_u	    bg_color;	// background color number
 	    short_u	    ul_color;	// underline color number
+	    short_u	    font;	// font number
 # ifdef FEAT_TERMGUICOLORS
 	    guicolor_T	    fg_rgb;	// foreground color RGB
 	    guicolor_T	    bg_rgb;	// background color RGB
diff --git a/src/term.c b/src/term.c
index 734b759..2e2c6df 100644
--- a/src/term.c
+++ b/src/term.c
@@ -625,7 +625,7 @@
 
 #ifdef FEAT_TERMGUICOLORS
 /*
- * Additions for using the RGB colors
+ * Additions for using the RGB colors and terminal font
  */
 static tcap_entry_T builtin_rgb[] = {
     // These are printf strings, not terminal codes.
@@ -637,6 +637,12 @@
 };
 #endif
 
+static tcap_entry_T special_term[] = {
+    // These are printf strings, not terminal codes.
+    {(int)KS_CF,	"\033[%dm"},
+    {(int)KS_NAME,	NULL}  // end marker
+};
+
 /*
  * iris-ansi for Silicon Graphics machines.
  */
@@ -1235,6 +1241,7 @@
     {(int)KS_U7,	"[U7]"},
     {(int)KS_RFG,	"[RFG]"},
     {(int)KS_RBG,	"[RBG]"},
+    {(int)KS_CF,	"[CF%d]"},
     {K_UP,		"[KU]"},
     {K_DOWN,		"[KD]"},
     {K_LEFT,		"[KL]"},
@@ -1754,6 +1761,7 @@
 			{KS_CBE, "BE"}, {KS_CBD, "BD"},
 			{KS_CST, "ST"}, {KS_CRT, "RT"},
 			{KS_SSI, "Si"}, {KS_SRI, "Ri"},
+			{KS_CF, "CF"},
 			{(enum SpecialKey)0, NULL}
 		    };
     int		    i;
@@ -2113,6 +2121,8 @@
 		&& term_strings_not_set(KS_8U))
 	    apply_builtin_tcap(term, builtin_rgb, TRUE);
 #endif
+	if (term_strings_not_set(KS_CF))
+	    apply_builtin_tcap(term, special_term, TRUE);
     }
 
 /*
@@ -3116,6 +3126,17 @@
 }
 #endif
 
+    void
+term_font(int n)
+{
+    if (*T_CFO)
+    {
+	char buf[20];
+	sprintf(buf, (char *)T_CFO, 9 + n);
+	OUT_STR(buf);
+    }
+}
+
     static void
 term_color(char_u *s, int n)
 {
diff --git a/src/termdefs.h b/src/termdefs.h
index 9f72dc1..f28fd19 100644
--- a/src/termdefs.h
+++ b/src/termdefs.h
@@ -114,10 +114,11 @@
     KS_SSI,	// save icon text
     KS_SRI,	// restore icon text
     KS_FD,	// disable focus event tracking
-    KS_FE	// enable focus event tracking
+    KS_FE,	// enable focus event tracking
+    KS_CF	// set terminal alternate font
 };
 
-#define KS_LAST	    KS_FE
+#define KS_LAST	    KS_CF
 
 /*
  * the terminal capabilities are stored in this array
@@ -191,6 +192,7 @@
 #define T_CAF	(TERM_STR(KS_CAF))	// set foreground color (ANSI)
 #define T_CAB	(TERM_STR(KS_CAB))	// set background color (ANSI)
 #define T_CAU	(TERM_STR(KS_CAU))	// set underline color (ANSI)
+#define T_CFO	(TERM_STR(KS_CF))	// set alternate font
 #define T_LE	(TERM_STR(KS_LE))	// cursor left
 #define T_ND	(TERM_STR(KS_ND))	// cursor right
 #define T_CIS	(TERM_STR(KS_CIS))	// set icon text start
diff --git a/src/testdir/test_highlight.vim b/src/testdir/test_highlight.vim
index af60503..b831878 100644
--- a/src/testdir/test_highlight.vim
+++ b/src/testdir/test_highlight.vim
@@ -888,6 +888,16 @@
   highlight Normal ctermul=NONE
 endfunc
 
+" Test for 'ctermfont' in a highlight group
+func Test_highlight_ctermfont()
+  CheckNotGui
+  call assert_notmatch('ctermfont=', HighlightArgs('Normal'))
+  highlight Normal ctermfont=3
+  call assert_match('ctermfont=3', HighlightArgs('Normal'))
+  call assert_equal('3', synIDattr(synIDtrans(hlID('Normal')), 'font'))
+  highlight Normal ctermfont=NONE
+endfunc
+
 " Test for specifying 'start' and 'stop' in a highlight group
 func Test_highlight_start_stop()
   hi HlGrp1 start=<Esc>[27h;<Esc>[<Space>r;
@@ -1314,6 +1324,7 @@
   call hlset([{'name': 'hlg11', 'ctermfg': ''}])
   call hlset([{'name': 'hlg11', 'ctermbg': ''}])
   call hlset([{'name': 'hlg11', 'ctermul': ''}])
+  call hlset([{'name': 'hlg11', 'ctermfont': ''}])
   call hlset([{'name': 'hlg11', 'font': ''}])
   call hlset([{'name': 'hlg11', 'gui': {}}])
   call hlset([{'name': 'hlg11', 'guifg': ''}])
diff --git a/src/version.c b/src/version.c
index b44385a..8b19d81 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    30,
+/**/
     29,
 /**/
     28,