olschool,
I am afraid there is no such plugin available in MyEclipse to support editing other languages.
You can try installing third party plugins which are compatible with Eclipse to add support for editing other language files including syntax highlighting.
Before installing third party plugins, please ensure that the plugin is compatible with base Eclipse version of the MyEclipse you are working with. MyEclipse 2017 is based on Eclipse Neon.
Please let us know if you have any other questions.
–Swapna
MyEclipse Support