diff --git a/c.nanorc b/c.nanorc
index 728dac6..4ddd554 100644
--- a/c.nanorc
+++ b/c.nanorc
@@ -1,6 +1,6 @@
 ## Here is an example for C/C++.
 ##
-syntax "C" "\.(c(c|pp|xx)?|C)$" "\.(h(h|pp|xx)?|H)$" "\.ii?$" "\.(def)$"
+syntax "C" "\.(c(c|pp|xx)?|C)$" "\.(h(h|pp|xx)?|H)$" "\.ii?$" "\.(def)$" "\.ino"
 magic "^(C|C\+\+) (source|program)"
 comment "//"
 color brightred "\<[A-Z_][0-9A-Z_]+\>" 
diff --git a/css.nanorc b/css.nanorc
index 3e6b83c..04d4a97 100644
--- a/css.nanorc
+++ b/css.nanorc
@@ -1,7 +1,7 @@
 ## Here is an example for css files.
 ##
 
-syntax "CSS" "\.(css|scss)$"
+syntax "CSS" "\.(css|scss|less)$"
 color brightred     "."
 color brightyellow  start="\{" end="\}"
 color brightwhite   start=":" end="[;^\{]"
diff --git a/fish.nanorc b/fish.nanorc
index 85fa258..081ee9a 100644
--- a/fish.nanorc
+++ b/fish.nanorc
@@ -1,6 +1,7 @@
 ## Here is an example for Fish shell scripts.
 ##
 syntax "Fish" "\.fish$"
+header "^#!.*/(env +)?fish( |$)"
 icolor brightgreen "^[0-9A-Z_]+\(\)"
 color green "\<(alias|begin|break|case|continue|contains|else|end|for|function|if|math|return|set|switch|test|while)\>"
 color green "(\{|\}|\(|\)|\;|\]|\[|`|\\|\$|<|>|!|=|&|\|)"
diff --git a/html.nanorc b/html.nanorc
index 4f225d8..77a04dd 100644
--- a/html.nanorc
+++ b/html.nanorc
@@ -1,6 +1,6 @@
 ## HTML syntax highlighting rules for Nano
 
-syntax "HTML" "\.html?(.j2)?$"
+syntax "HTML" "\.html?(.j2)?(.twig)?$"
 magic "HTML document"
 comment "<!--|-->"
 
diff --git a/sh.nanorc b/sh.nanorc
index 3771b87..febc22c 100644
--- a/sh.nanorc
+++ b/sh.nanorc
@@ -1,7 +1,7 @@
 ## Here is an example for Bourne shell scripts.
 ##
-syntax "SH" "\.sh$" "\.bashrc" "bashrc" "\.bash_aliases" "bash_aliases" "\.bash_functions" "bash_functions" "\.bash_login" "\.bash_logout" "\.bash_profile" "bash_profile" "\.profile" "revise\..+$"
-header "^#!.*/(env +)?(ba)?sh( |$)"
+syntax "SH" "\.sh$" "\.ash" "\.bashrc" "bashrc" "\.bash_aliases" "bash_aliases" "\.bash_functions" "bash_functions" "\.bash_login" "\.bash_logout" "\.bash_profile" "bash_profile" "\.profile" "revise\..+$"
+header "^#!.*/(env +)?(ba|da|a)?sh( |$)"
 magic "(POSIX|Bourne-Again) shell script.*text"
 comment "#"
 
diff --git a/twig.nanorc b/twig.nanorc
new file mode 120000
index 0000000..c18f7cb
--- /dev/null
+++ b/twig.nanorc
@@ -0,0 +1 @@
+html.nanorc
\ No newline at end of file
diff --git a/xml.nanorc b/xml.nanorc
index bd7b273..809a048 100644
--- a/xml.nanorc
+++ b/xml.nanorc
@@ -1,10 +1,11 @@
 ## Here is an example for xml files.
 ##
 
-syntax "XML" ".*\.([jrs]?html?|xml|sgml?|rng)$"
+syntax "XML" ".*\.([jrs]?html?|xml|sgml?|rng|vue|mei|musicxml)$"
 header "<\?xml.*version=.*\?>"
 magic "(XML|SGML) (sub)?document"
 comment "<!--|-->"
+
 color white "^.+$"
 color green  start="<" end=">"
 color cyan   "<[^> ]+"