[Core] Guild scoped I18n (#3896)

* Guild I18n

Never again!

* Finish off guild scoped i18n

* Black formatting

* Added guild only flags.

* Fix missing import.

* Added listing of guild i18n settings

* Added API support

* Added API support... properly!

* Added API support... for realsies!

* Auto-translate create_cases instances

You're welcome cog creators! Jack talked me into this!

* Fix get_regional_format to actually return properly

* Cleanup `set showsettings`

* Style pass

* Update redbot/core/core_commands.py

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

* Update redbot/core/events.py

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

* Update redbot/core/core_commands.py

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

* Fix missing import

* Improve caching

* Removal of unneeded function

* Fix some naming

* IDFK anymore...

* Reformat

* Update redbot/core/settings_caches.py

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

* Update redbot/core/settings_caches.py

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

* Update redbot/core/settings_caches.py

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

* Remove line number

* Fix global sets

* Set contextual locale manually where needed

* Reports cog is wonderful...

* Update redbot/core/core_commands.py

Co-authored-by: Draper <27962761+Drapersniper@users.noreply.github.com>

* Set contextual locale manually where needed in Mutes cog

* s

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>
Co-authored-by: Draper <27962761+Drapersniper@users.noreply.github.com>

redbot/cogs/mod/events.py

@@ -151,6 +151,9 @@ class Events(MixinMeta):
         # As are anyone configured to be
         if await self.bot.is_automod_immune(message):
             return
+
+        await i18n.set_contextual_locales_from_guild(self.bot, message.guild)
+
         deleted = await self.check_duplicates(message)
         if not deleted:
             await self.check_mention_spam(message)