Fix "PythonLanguage" typo

[szepeviktor]

Fix this typo all around the project. There are a few other misspelling fixes.

@robvanderleek Now this project is 100% perfect.

There is a prevention for this. A GitHub Actions workflow.

[robvanderleek]

Hi @szepeviktor 👋

Thanks! These were some pretty embarrassing typos 😳

I'll come back to the GH Action at a later time.

Kind regards, Rob

[szepeviktor]

Glad to contribute.