diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 11536adf69..3042e62508 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -771,8 +771,8 @@ au BufNewFile,BufRead gitolite.conf		setf gitolite
 au BufNewFile,BufRead {,.}gitolite.rc,example.gitolite.rc	setf perl
 
 " Glimmer-flavored TypeScript and JavaScript
-au BufNewFile,BufRead *.gts	setf typescript.glimmer
-au BufNewFile,BufRead *.gjs	setf javascript.glimmer
+au BufNewFile,BufRead *.gts			setf typescript.glimmer
+au BufNewFile,BufRead *.gjs			setf javascript.glimmer
 
 " Gnuplot scripts
 au BufNewFile,BufRead *.gpi,.gnuplot		setf gnuplot
@@ -803,6 +803,9 @@ au BufNewFile,BufRead */etc/group,*/etc/group-,*/etc/group.edit,*/etc/gshadow,*/
 " GTK RC
 au BufNewFile,BufRead .gtkrc,gtkrc		setf gtkrc
 
+" GYP
+au BufNewFile,BufRead *.gyp,*.gypi		setf gyp
+
 " Hack
 au BufRead,BufNewFile *.hack,*.hackpartial			setf hack
 
@@ -1027,6 +1030,9 @@ au BufNewFile,BufRead Kconfig,Kconfig.debug	setf kconfig
 " Lace (ISE)
 au BufNewFile,BufRead *.ace,*.ACE		setf lace
 
+" Latexmkrc
+au BufNewFile,BufRead .latexmkrc,latexmkrc	setf perl
+
 " Latte
 au BufNewFile,BufRead *.latte,*.lte		setf latte
 
@@ -2084,7 +2090,7 @@ au BufNewFile,BufReadPost *.tutor		setf tutor
 " TWIG files
 au BufNewFile,BufReadPost *.twig		setf twig
 
-" Typescript or Qt translation file (which is XML)
+" TypeScript or Qt translation file (which is XML)
 au BufNewFile,BufReadPost *.ts
 	\ if getline(1) =~ '<?xml' |
 	\   setf xml |
@@ -2092,6 +2098,9 @@ au BufNewFile,BufReadPost *.ts
 	\   setf typescript |
 	\ endif
 
+" TypeScript module and common
+au BufNewFile,BufRead *.mts,*.cts		setf typescript
+
 " TypeScript with React
 au BufNewFile,BufRead *.tsx			setf typescriptreact
 
@@ -2283,7 +2292,7 @@ au BufNewFile,BufRead *.fsproj,*.fsproj.user	setf xml
 au BufNewFile,BufRead *.vbproj,*.vbproj.user	setf xml
 
 " Qt Linguist translation source and Qt User Interface Files are XML
-" However, for .ts Typescript is more common.
+" However, for .ts TypeScript is more common.
 au BufNewFile,BufRead *.ui			setf xml
 
 " TPM's are RDF-based descriptions of TeX packages (Nikolai Weibull)
diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index bd317baae9..a7a34a54cd 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -448,6 +448,8 @@ local extension = {
   gsp = 'gsp',
   gjs = 'javascript.glimmer',
   gts = 'typescript.glimmer',
+  gyp = 'gyp',
+  gypi = 'gyp',
   hack = 'hack',
   hackpartial = 'hack',
   haml = 'haml',
@@ -1019,6 +1021,8 @@ local extension = {
   ts = function(path, bufnr)
     return M.getlines(bufnr, 1):find('<%?xml') and 'xml' or 'typescript'
   end,
+  mts = 'typescript',
+  cts = 'typescript',
   tsx = 'typescriptreact',
   uc = 'uc',
   uit = 'uil',
@@ -1496,6 +1500,8 @@ local filename = {
   ['/etc/shadow-'] = 'passwd',
   ['/etc/shadow'] = 'passwd',
   ['/etc/passwd.edit'] = 'passwd',
+  ['latexmkrc'] = 'perl',
+  ['.latexmkrc'] = 'perl',
   ['pf.conf'] = 'pf',
   ['main.cf'] = 'pfmain',
   pinerc = 'pine',
diff --git a/src/nvim/testdir/test_filetype.vim b/src/nvim/testdir/test_filetype.vim
index 4755d39cd3..6f7d9f75e6 100644
--- a/src/nvim/testdir/test_filetype.vim
+++ b/src/nvim/testdir/test_filetype.vim
@@ -240,6 +240,7 @@ let s:filename_checks = {
     \ 'grub': ['/boot/grub/menu.lst', '/boot/grub/grub.conf', '/etc/grub.conf', 'any/boot/grub/grub.conf', 'any/boot/grub/menu.lst', 'any/etc/grub.conf'],
     \ 'gsp': ['file.gsp'],
     \ 'gtkrc': ['.gtkrc', 'gtkrc', '.gtkrc-file', 'gtkrc-file'],
+    \ 'gyp': ['file.gyp', 'file.gypi'],
     \ 'hack': ['file.hack', 'file.hackpartial'],
     \ 'haml': ['file.haml'],
     \ 'hamster': ['file.hsm'],
@@ -412,7 +413,7 @@ let s:filename_checks = {
     \ 'pccts': ['file.g'],
     \ 'pcmk': ['file.pcmk'],
     \ 'pdf': ['file.pdf'],
-    \ 'perl': ['file.plx', 'file.al', 'file.psgi', 'gitolite.rc', '.gitolite.rc', 'example.gitolite.rc'],
+    \ 'perl': ['file.plx', 'file.al', 'file.psgi', 'gitolite.rc', '.gitolite.rc', 'example.gitolite.rc', '.latexmkrc', 'latexmkrc'],
     \ 'pf': ['pf.conf'],
     \ 'pfmain': ['main.cf'],
     \ 'php': ['file.php', 'file.php9', 'file.phtml', 'file.ctp', 'file.phpt', 'file.theme'],
@@ -582,6 +583,7 @@ let s:filename_checks = {
     \ 'tssop': ['file.tssop'],
     \ 'tsv': ['file.tsv'],
     \ 'twig': ['file.twig'],
+    \ 'typescript': ['file.mts', 'file.cts'],
     \ 'typescript.glimmer': ['file.gts'],
     \ 'typescriptreact': ['file.tsx'],
     \ 'uc': ['file.uc'],