ExtraneousLanguage / Extend the CanonicalPropertyAliases members

[mwjames]

This PR is made in reference to: #1848

This PR addresses or contains:

This PR includes:

• Tests (unit/integration)
• CI build passed

[mwjames]

I wanted to draw attention to a PR that has the potential for a regression

@kghbln FYI; Speaking of regression, I found one while browsing [0]. Properties would appear as redlinks instead of the linking to the property page due to some of them missing the canonical form in the search array (lucky us the sandbox uses FR which allowed to spot this).

[0] http://sandbox.semantic-mediawiki.org/wiki/Sp%C3%A9cial:Parcourir/Athens-23_QUERYa9764e9cc227bd29aabe7aebfd41a997

[kghbln]

(lucky us the sandbox uses FR which allowed to spot this)

It was indeed a pretty good idea to do the switch not only to another language than just English as the ultimate fallback language but also to a language like French which is somewhat familiar an providing some linguistic extras.