Switch search engines locale based on languages

[luixxiul]

Expected behavior: Switch search engines locale based on languages. Japanese users generally want to use https://amazon.co.jp instead of https://amazon.com, for example.

• Brave Version: master branch
• Any related issues: Search engines localization tracking issue #5179

[bbondy]

/cc @bradleyrichter it seems like region selection matters for things like adblock as well. In your opinion should it be tied to the language selection? Should we be combining this type of thing into a generic region selection or just allow you to configure it?

[bradleyrichter]

Sure. Let's connect regional features that make sense. A user can always override the setting or even the language selection. We should add some note:text in the language area though.

[bsclifton]

This should be addressed in brave-core with the OpenSearch functionality built in (ex: we won't be providing US specific search engines to anyone; engines they visit (which are localized) get added to aggregated list)