In T341175#9014062, @Taylor wrote:

The former "Sitetitle" contains "{{SITENAME}}".

I edited the latter "Tagline" but it does not seem to be used in any way.

I agree to change the logo as outlined above.

I however do not agree with change of the namespace from "Wiktionary" to "Wikikamus", because the ns 4 is already broken for all wikis, and the requested change will worsen the mess. A namespace should NOT be named "Wikipedia", "Wiktionary", "Wikikamus" or similar. Maybe I will make a proposal about this one day.

In T341767#9011819, @Func wrote:

In T341767#9011790, @Veracious wrote:

So... is there any way to change the canonical namespace into the new one?

The canonical namespace should stay unchanged like every other project (e.g. idwikibooks's Wikibuku namespace with the canonical name Wikibooks).
If what you want to mention is some page's heading still using Wikiquote, the cache would be expired in a few days if no one touch them. Or you can do an action=purge or null edit which would regen the parser cache.

In T341767#9011745, @Func wrote:

You should have brought up this during backport window in the IRC channel.

But it seems not needed since that namespace change only did localisation, Wikiquote is still the canonical namespace and accessible anyway.