Update README.md Language

[chrishalbert]

This has some minor linguistic updates to the readme. There's nothing earth shattering, but I thought it would be helpful. Thanks!

PR Checklist:

• [ x ] Have you read the CONTRIBUTING.md?
• [ x ] Have you rebased your work on top of the latest dev?
• [ x ] Does your PR follow the Conventional Commits Guide?
• [ x ] Have you checked your code compiles? (yarn build)
• [ x ] Have you included tests for any non-trivial functionality?
• [ x ] Have you followed the Multi-Language Content Management Guide?
• [ x ] Have you checked your code passes the unit tests? (yarn test)
• [ x ] Have you checked your code formatting is correct? (yarn lint:js)
• [ x ] If you added any dependencies, have you checked they do not contain any known vulnerabilities? (yarn audit)
• [ x ] If you are contributing for the first time, please read the agreement in CONTRIBUTING.md now and add a comment to this pull request stating that your PR is in accordance with the Developer's Certificate of Origin.

Thank you for your code, it's appreciated! :)