languageLang is not in the Hugo documentation, defaultContentLanguage is

[Marzal]

What this PR does / why we need it:
languageLang in exampleSite/config[-dev].toml seems an obsolete option.

Special notes for your reviewer:
I've searched in the Hugo Docs and in the github's repos but I dont' find languageLang anywhere.
defaultContentLanguage is documented and is propably the correct option.

Release note:

Change languageLang to defaultContentLanguage in config.toml

[ghost]

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[mpourismaiel]

Thanks a lot. I can't find languageLang as well. I'm not sure if it's PascalCase or camelCase since the documentation uses both versions. Let me check it out and get back to you.

[Marzal]

OK.
What I have found is that in the Hugo docs "All Configuration Settings" are in camelCase (I just copy&pasted the setting), also in this PR they favor camelCase and link to a conversation about the topic.

[mpourismaiel]

Fantastic. Thanks a lot for helping us out.