[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/reports/reports.py

@@ -11,7 +11,7 @@ from redbot.core.utils import AsyncIter
 from redbot.core.utils.chat_formatting import pagify, box
 from redbot.core.utils.antispam import AntiSpam
 from redbot.core.bot import Red
-from redbot.core.i18n import Translator, cog_i18n
+from redbot.core.i18n import Translator, cog_i18n, set_contextual_locales_from_guild
 from redbot.core.utils.predicates import MessagePredicate
 from redbot.core.utils.tunnel import Tunnel
 
@@ -346,8 +346,10 @@ class Reports(commands.Cog):
 
         if t is None:
             return
+        guild = t[0][0]
         tun = t[1]["tun"]
         if payload.user_id in [x.id for x in tun.members]:
+            await set_contextual_locales_from_guild(self.bot, guild)
             await tun.react_close(
                 uid=payload.user_id, message=_("{closer} has closed the correspondence")
             )
@@ -365,6 +367,7 @@ class Reports(commands.Cog):
                 to_remove.append(k)
                 continue
 
+            await set_contextual_locales_from_guild(self.bot, guild)
             topic = _("Re: ticket# {ticket_number} in {guild.name}").format(
                 ticket_number=ticket_number, guild=guild
             )
@@ -376,6 +379,7 @@ class Reports(commands.Cog):
         for key in to_remove:
             if tun := self.tunnel_store.pop(key, None):
                 guild, ticket = key
+                await set_contextual_locales_from_guild(self.bot, guild)
                 await tun["tun"].close_because_disabled(
                     _(
                         "Correspondence about ticket# {ticket_number} in "