.TMLANGUAGE File

The tmLanguage file extension is associated with the TextMate text and source code editor for OS X (macOS) or Sublime Text (text and code editor available on many major platforms).

The .tmlanguage file contains settings and data used to check grammar in the document or syntax highlighting. It is used XML formatting.

A tmLanguage file is text file type based on XML syntax and contains settings for TextMate or Sublime Text code editors.

How to open:

TmLanguage file type is in common text format. You can open and edit it by any text editor. This file fulfills its purpose only in programs and code editors (Sublime Text, TextMate) that can import tmLanguage files and use them for the syntax highlighting or other settings.

How to convert:

There is no reason to convert this file type. It is possible to convert it into any text file type or XML, but the purpose of this file is only for setting up the program (TextMate or SublimeText).