clike:
text/x-csrc
text/x-c
text/x-chdr
text/x-c++src
text/x-c++hdr
text/x-java
text/x-csharp
text/x-scala

clojure:
text/x-clojure

coffeescript:
text/x-coffeescript

commonlisp:
text/x-common-lisp

css:
text/css
text/x-scss

d:
text/x-d

diff:
text/x-diff

dtd:
application/xml-dtd

erlang:
text/x-erlang

gas:
text/x-gas

gerrit_commit:
text/x-gerrit-commit-message

gfm:
text/x-github-markdown

go:
text/x-go

groovy:
text/x-groovy

haskell:
text/x-haskell

htmlmixed:
text/html

javascript:
text/javascript
text/ecmascript
application/javascript
application/ecmascript
application/json
application/x-json
text/typescript
application/typescript

lua:
text/x-lua

markdown:
text/x-markdown

perl:
text/x-perl

properties:
text/x-ini
text/x-properties

perl:
text/x-perl

php:
application/x-httpd-php
application/x-httpd-php-open
text/x-php

pig:
text/x-pig

python:
text/x-python

r:
text/r-src

ruby:
text/x-ruby

scheme:
text/x-scheme

shell:
text/x-sh
application/x-shellscript

smalltalk:
text/x-stsrc

sql:
text/x-sql
text/x-mariadb
text/x-mysql
text/x-plsql

tcl:
text/x-tcl

velocity:
text/velocity

verilog:
text/x-verilog

xml:
text/xml
application/xml

yaml:
text/x-yaml

application/x-javascript = application/javascript
application/x-shellscript = text/x-sh
application/x-tcl = text/x-tcl
text/x-h = text/x-c++hdr
text/x-java-source = text/x-java
text/x-scripttcl = text/x-tcl