From c2bb0181b8cb58dbbd6fe6a145b46b6f86feecbe Mon Sep 17 00:00:00 2001
From: neutrinoA4 <test@test.com>
Date: Sat, 16 Mar 2024 14:52:14 +0900
Subject: [PATCH 1/3] Language settings for copilot answers

---
 lua/CopilotChat/config.lua  |  2 ++
 lua/CopilotChat/init.lua    | 13 +++++++++++++
 lua/CopilotChat/prompts.lua |  6 ++++++
 3 files changed, 21 insertions(+)

diff --git a/lua/CopilotChat/config.lua b/lua/CopilotChat/config.lua
index 842bb4db..702972db 100644
--- a/lua/CopilotChat/config.lua
+++ b/lua/CopilotChat/config.lua
@@ -50,6 +50,7 @@ local select = require('CopilotChat.select')
 ---@field proxy string?
 ---@field allow_insecure boolean?
 ---@field debug boolean?
+---@field language string?
 ---@field show_user_selection boolean?
 ---@field show_system_prompt boolean?
 ---@field show_folds boolean?
@@ -76,6 +77,7 @@ return {
   auto_follow_cursor = true, -- Auto-follow cursor in chat
   name = 'CopilotChat', -- Name to use in chat
   separator = '---', -- Separator to use in chat
+  language = nil, -- Copilot answer language settings when using default prompts. Default language is English.
   -- default prompts
   prompts = {
     Explain = {
diff --git a/lua/CopilotChat/init.lua b/lua/CopilotChat/init.lua
index f993c023..186bae12 100644
--- a/lua/CopilotChat/init.lua
+++ b/lua/CopilotChat/init.lua
@@ -396,10 +396,23 @@ function M.debug(debug)
   log.logfile = logfile
 end
 
+--- Set up the language for default prompts
+---@param config CopilotChat.config|nil
+function M.setup_copilot_language(config)
+  if not config or not config.language then
+    return
+  end
+
+  for _, prompt in pairs(config.prompts) do
+    prompt.prompt = prompt.prompt .. " " .. prompts.PROMPT_ANSWER_LANGUAGE_TEMPLATE(config.language)
+  end
+end
+
 --- Set up the plugin
 ---@param config CopilotChat.config|nil
 function M.setup(config)
   M.config = vim.tbl_deep_extend('force', default_config, config or {})
+  M.setup_copilot_language(M.config)
   state.copilot = Copilot(M.config.proxy, M.config.allow_insecure)
 
   state.diff = Diff(
diff --git a/lua/CopilotChat/prompts.lua b/lua/CopilotChat/prompts.lua
index bc2737a3..1e374571 100644
--- a/lua/CopilotChat/prompts.lua
+++ b/lua/CopilotChat/prompts.lua
@@ -175,4 +175,10 @@ M.SHOW_CONTEXT = [[
 At the beginning of your response show code outline from all the provided files coming from Context and Active Selection.
 ]]
 
+---Prompt for the user to provide a language
+--- @param language string
+function M.PROMPT_ANSWER_LANGUAGE_TEMPLATE(language)
+  return string.format([[Please answer in %s.]], language)
+end
+
 return M

From 6c2a055c9abe14d82bad3f3ae16236a036a669c6 Mon Sep 17 00:00:00 2001
From: neutrinoA4 <test@test.com>
Date: Sat, 16 Mar 2024 15:07:10 +0900
Subject: [PATCH 2/3] Add language settings to README

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 79de9011..e2ef0849 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,7 @@ return {
     },
     opts = {
       debug = true, -- Enable debugging
+      -- language = "English" -- Copilot answer language settings when using default prompts. Default language is English.
       -- See Configuration section for rest
     },
     -- See Commands section for default commands if you want to lazy load on them

From 5966d8c1d8b94126c7581494f9809a86cbf2ab3a Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Sat, 16 Mar 2024 06:13:23 +0000
Subject: [PATCH 3/3] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 lua/CopilotChat/init.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lua/CopilotChat/init.lua b/lua/CopilotChat/init.lua
index 186bae12..42a51831 100644
--- a/lua/CopilotChat/init.lua
+++ b/lua/CopilotChat/init.lua
@@ -404,7 +404,7 @@ function M.setup_copilot_language(config)
   end
 
   for _, prompt in pairs(config.prompts) do
-    prompt.prompt = prompt.prompt .. " " .. prompts.PROMPT_ANSWER_LANGUAGE_TEMPLATE(config.language)
+    prompt.prompt = prompt.prompt .. ' ' .. prompts.PROMPT_ANSWER_LANGUAGE_TEMPLATE(config.language)
   end
 end