Update contribute.mdx

content/docs/contribute.mdx

@@ -18,7 +18,7 @@ We have a spreadsheet with a Google Form linked at the top so people can report
 
 ## Code Contribution
 
-Mythic is an open-source app that is published on GitHub and all of the code can be viewed there but can also be edited when the repository is forked. Mythic is coded in Swift, Apple's proprietary language for apps. When you make changes on the fork, make sure to sync branch often and create a pull request so we can add it to Mythic.
+Mythic is an open-source app that is published on GitHub and all of the code can be viewed there but can also be edited when the repository is forked. Mythic is coded in Swift, Apple's open source language for apps. When you make changes on the fork, make sure to sync branch often and create a pull request so we can add it to Mythic.
 
 [Contribute to Mythic's repository](https://github.com/MythicApp/Mythic/fork)