diff --git a/Containerfile b/Containerfile
index a7a2dc7..b7fd545 100644
--- a/Containerfile
+++ b/Containerfile
@@ -44,7 +44,7 @@ RUN cmake \
     dtranslatebot
 RUN cmake --build dtranslatebot-build
 RUN cmake --install dtranslatebot-build --strip
-RUN echo "{\"translator\":{\"type\":\"stub\"}}" | jq > dtranslatebot.json
+RUN echo '{"translator":{"type":"stub"}}' | jq > dtranslatebot.json
 
 # Create the dtranslatebot Container
 FROM alpine:3.23
diff --git a/src/core/database.cpp b/src/core/database.cpp
index 2911138..1fe3ea7 100644
--- a/src/core/database.cpp
+++ b/src/core/database.cpp
@@ -102,6 +102,22 @@ std::vector<dpp::snowflake> database::get_guilds()
     return {};
 }
 
+bot::settings::user database::get_user(dpp::snowflake user_id)
+{
+#ifndef NDEBUG
+    std::cerr << "[Debug] database::get_user(dpp::snowflake) have being called." << std::endl;
+#endif
+    return {};
+}
+
+std::vector<dpp::snowflake> database::get_users()
+{
+#ifndef NDEBUG
+    std::cerr << "[Debug] database::get_users() have being called." << std::endl;
+#endif
+    return {};
+}
+
 void database::set_channel_source(dpp::snowflake guild_id, dpp::snowflake channel_id, const std::string &source)
 {
 #ifndef NDEBUG
@@ -109,6 +125,13 @@ void database::set_channel_source(dpp::snowflake guild_id, dpp::snowflake channe
 #endif
 }
 
+void database::set_user_target(dpp::snowflake user_id, const std::string &target)
+{
+#ifndef NDEBUG
+    std::cerr << "[Debug] database::set_user_target(dpp::snowflake, const std::string&) have being called." << std::endl;
+#endif
+}
+
 bool database::sync()
 {
 #ifndef NDEBUG
diff --git a/src/core/database.h b/src/core/database.h
index 2589f46..e8d64db 100644
--- a/src/core/database.h
+++ b/src/core/database.h
@@ -48,7 +48,10 @@ namespace bot {
             virtual std::vector<bot::settings::target> get_channel_targets(dpp::snowflake guild_id, dpp::snowflake channel_id);
             */
             virtual std::vector<dpp::snowflake> get_guilds();
+            virtual bot::settings::user get_user(dpp::snowflake user_id);
+            virtual std::vector<dpp::snowflake> get_users();
             virtual void set_channel_source(dpp::snowflake guild_id, dpp::snowflake channel_id, const std::string &source);
+            virtual void set_user_target(dpp::snowflake user_id, const std::string &target);
             virtual bool sync();
         };
     }
diff --git a/src/core/http_request.cpp b/src/core/http_request.cpp
index 7d780b4..58d9e0e 100644
--- a/src/core/http_request.cpp
+++ b/src/core/http_request.cpp
@@ -17,7 +17,6 @@
 *****************************************************************************/
 
 #include "http_request.h"
-using namespace std::string_literals;
 
 http_request::http_request() {
     instance = curl_easy_init();
@@ -56,7 +55,7 @@ const http_response http_request::post(const std::string &url, const std::string
     curl_easy_setopt(instance, CURLOPT_URL, url.c_str());
     curl_slist *header_slist = nullptr;
     if (!content_type.empty()) {
-        curl_slist *new_header_slist = curl_slist_append(header_slist, std::string("Content-Type: "s + content_type).c_str());
+        curl_slist *new_header_slist = curl_slist_append(header_slist, std::string("Content-Type: " + content_type).c_str());
         if (!new_header_slist) {
             curl_slist_free_all(header_slist);
             throw std::bad_alloc();
@@ -88,7 +87,7 @@ const http_response http_request::post(const std::string &url, const std::string
 }
 
 std::string http_request::legacy_url(const std::string &hostname, uint16_t port, const std::string &url, bool tls) {
-    return (tls ? "https://"s : "http://"s) + hostname + ":"s + std::to_string(port) + (url.empty() ? "/"s : (url.front() != '/' ? "/"s + url : url));
+    return (tls ? "https://" : "http://") + hostname + ":" + std::to_string(port) + (url.empty() ? "/" : (url.front() != '/' ? "/" + url : url));
 }
 
 http_request::~http_request() {
diff --git a/src/core/settings.cpp b/src/core/settings.cpp
index b00895a..5ad86b6 100644
--- a/src/core/settings.cpp
+++ b/src/core/settings.cpp
@@ -66,7 +66,7 @@ void process_database_channels(std::shared_ptr<bot::database::database> database
     }
 }
 
-void process_database(std::shared_ptr<bot::database::database> database, std::vector<guild> &guilds, std::vector<dpp::snowflake> &webhookIds)
+void process_database(std::shared_ptr<bot::database::database> database, std::vector<guild> &guilds, std::vector<user> &users, std::vector<dpp::snowflake> &webhookIds)
 {
     std::cout << "[Launch] Loading database..." << std::endl;
     const std::vector<dpp::snowflake> db_guilds = database->get_guilds();
@@ -86,6 +86,13 @@ void process_database(std::shared_ptr<bot::database::database> database, std::ve
             guilds.push_back(std::move(guild));
         }
     }
+    const std::vector<dpp::snowflake> db_users = database->get_users();
+    for (auto db_user_id = db_users.begin(); db_user_id != db_users.end(); db_user_id++) {
+        bot::settings::user user = database->get_user(*db_user_id);
+        if (user.target.empty())
+            user.target = "en";
+        users.push_back(std::move(user));
+    }
 }
 
 void process_guild_settings(const dpp::json &json, std::vector<guild> &guilds, std::vector<dpp::snowflake> &webhookIds)
@@ -485,6 +492,20 @@ const target* settings::get_target(const channel *channel, const std::string &ta
     return nullptr;
 }
 
+user* settings::get_user(dpp::snowflake user_id) {
+    if (!m_externallyLockedCount) {
+#ifndef NDEBUG
+        std::cerr << "[Debug] settings::get_user(dpp::snowflake) have being called without settings being locked." << std::endl;
+#endif
+        return nullptr;
+    }
+    for (auto user = m_users.begin(); user != m_users.end(); user++) {
+        if (user->id == user_id)
+            return &*user;
+    }
+    return nullptr;
+}
+
 const std::vector<std::string> settings::preferred_languages() const
 {
     const std::lock_guard<std::recursive_mutex> guard(m_mutex);
@@ -509,6 +530,19 @@ const std::string settings::token() const
     return m_token;
 }
 
+void settings::set_user_target(dpp::snowflake user_id, std::string target) {
+    const std::lock_guard<std::recursive_mutex> guard(m_mutex);
+    for (auto user = m_users.begin(); user != m_users.end(); user++) {
+        if (user->id == user_id) {
+            user->target = target;
+            return;
+        }
+    }
+
+    // We will create the user structure when it is not in memory
+    m_users.push_back({ user_id, target });
+}
+
 bool settings::is_translatebot(dpp::snowflake webhook_id) const
 {
     const std::lock_guard<std::recursive_mutex> guard(m_mutex);
@@ -582,7 +616,7 @@ bool settings::parse(const std::string &data, bool initialize)
         if (json_user != json.end() && json_user->is_object())
             process_user_settings(*json_user, m_avatarSize);
 
-        process_database(m_database, m_guilds, m_webhookIds);
+        process_database(m_database, m_guilds, m_users, m_webhookIds);
 
         return true;
     }
diff --git a/src/core/settings.h b/src/core/settings.h
index f71f812..80dc3ad 100644
--- a/src/core/settings.h
+++ b/src/core/settings.h
@@ -45,11 +45,15 @@ namespace bot {
             target* get_target(dpp::snowflake guild_id, dpp::snowflake channel_id, const std::string &target);
             static target* get_target(channel *channel, const std::string &target);
             static const target* get_target(const channel *channel, const std::string &target);
+            user* get_user(dpp::snowflake user_id);
             const std::vector<std::string> preferred_languages() const;
             std::shared_ptr<bot::database::database> get_database() const;
             std::shared_ptr<bot::translator::translator> get_translator() const;
             const std::string token() const;
 
+            /* set functions */
+            void set_user_target(dpp::snowflake user_id, std::string target);
+
             /* is functions */
             bool is_translatebot(dpp::snowflake webhook_id) const;
 
@@ -75,6 +79,7 @@ namespace bot {
             std::vector<std::string> m_prefLangs;
             std::shared_ptr<bot::translator::translator> m_translator;
             std::string m_token;
+            std::vector<user> m_users;
             std::vector<dpp::snowflake> m_webhookIds;
         };
     }
diff --git a/src/core/settings_types.h b/src/core/settings_types.h
index 96d9017..911acb6 100644
--- a/src/core/settings_types.h
+++ b/src/core/settings_types.h
@@ -40,6 +40,10 @@ namespace bot {
             dpp::snowflake id;
             std::vector<bot::settings::channel> channel;
         };
+        struct user {
+            dpp::snowflake id;
+            std::string target;
+        };
         struct translator {
             std::string type;
             std::string hostname;
diff --git a/src/core/webhook_push.cpp b/src/core/webhook_push.cpp
index 3d4e567..3f80881 100644
--- a/src/core/webhook_push.cpp
+++ b/src/core/webhook_push.cpp
@@ -43,15 +43,15 @@ void bot::webhook_push::run(const bot::translated_guild_message &message, dpp::c
             }
             else {
                 bot::svmatch match;
-                if (bot::regex_match(message_eov.begin(), message_eov.end(), match, bot::regex("^.*(\\.|\\?|\\!|\\。)\\s.*$"s))) {
+                if (bot::regex_match(message_eov.begin(), message_eov.end(), match, bot::regex("^.*(\\.|\\?|\\!|\\。)\\s.*$"))) {
                     json_body["content"] = message_v.substr(0, 1334 + match.position(1));
                     message_v = message_v.substr(1334 + match.position(1));
                 }
-                else if (bot::regex_match(message_eov.begin(), message_eov.end(), match, bot::regex("^.*(\\,)\\s.*$"s))) {
+                else if (bot::regex_match(message_eov.begin(), message_eov.end(), match, bot::regex("^.*(\\,)\\s.*$"))) {
                     json_body["content"] = message_v.substr(0, 1334 + match.position(1));
                     message_v = message_v.substr(1334 + match.position(1));
                 }
-                else if (bot::regex_match(message_eov.begin(), message_eov.end(), match, bot::regex("^.*()\\s.*$"s))) {
+                else if (bot::regex_match(message_eov.begin(), message_eov.end(), match, bot::regex("^.*()\\s.*$"))) {
                     json_body["content"] = message_v.substr(0, 1334 + match.position(1));
                     message_v = message_v.substr(1334 + match.position(1));
                 }
diff --git a/src/database/file/file.cpp b/src/database/file/file.cpp
index e7c6a6d..5097426 100644
--- a/src/database/file/file.cpp
+++ b/src/database/file/file.cpp
@@ -1,6 +1,6 @@
 /*****************************************************************************
 * dtranslatebot Discord Translate Bot
-* Copyright (C) 2024 Syping
+* Copyright (C) 2024-2026 Syping
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
@@ -275,9 +275,8 @@ std::vector<dpp::snowflake> file::get_channels(dpp::snowflake guild_id)
     const std::lock_guard<std::mutex> guard(m_mutex);
 
     for (auto guild = m_channelCache.begin(); guild != m_channelCache.end(); guild++) {
-        if (guild->id == guild_id) {
+        if (guild->id == guild_id)
             return guild->channel;
-        }
     }
 
     std::vector<dpp::snowflake> channels;
@@ -334,6 +333,28 @@ std::vector<dpp::snowflake> file::get_guilds()
     return guilds;
 }
 
+bot::settings::user file::get_user(dpp::snowflake user_id)
+{
+    const std::lock_guard<std::mutex> guard(m_mutex);
+
+    for (auto user = m_userCache.begin(); user != m_userCache.end(); user++) {
+        if (user->id == user_id)
+            return *user;
+    }
+
+    bot::settings::user user;
+    cache_get_user(user_id, user);
+    return user;
+}
+
+std::vector<dpp::snowflake> file::get_users()
+{
+    const std::lock_guard<std::mutex> guard(m_mutex);
+    std::vector<dpp::snowflake> users;
+    list_users(users);
+    return users;
+}
+
 void file::set_channel_source(dpp::snowflake guild_id, dpp::snowflake channel_id, const std::string &source)
 {
     const std::lock_guard<std::mutex> guard(m_mutex);
@@ -363,6 +384,20 @@ void file::set_channel_source(dpp::snowflake guild_id, dpp::snowflake channel_id
     m_dataCache.push_back({ guild_id, { std::move(channel) } });
 }
 
+void file::set_user_target(dpp::snowflake user_id, const std::string &target)
+{
+    const std::lock_guard<std::mutex> guard(m_mutex);
+
+    for (auto user = m_userCache.begin(); user != m_userCache.end(); user++) {
+        if (user->id == user_id) {
+            user->target = target;
+            return;
+        }
+    }
+
+    m_userCache.push_back({ user_id, target });
+}
+
 bool file::sync()
 {
     const std::lock_guard<std::mutex> guard(m_mutex);
@@ -444,6 +479,35 @@ void file::cache_get_channel(dpp::snowflake channel_id, settings::channel &chann
     }
 }
 
+void file::cache_get_user(dpp::snowflake user_id, settings::user &user)
+{
+    user.id = user_id;
+
+    const std::filesystem::path user_file = m_storagePath / "user" / (std::to_string(user_id) + ".json");
+
+    if (!std::filesystem::is_regular_file(user_file))
+        return;
+
+    std::ifstream ifs(user_file, std::ios::in | std::ios::binary);
+    if (!ifs.is_open())
+        return;
+
+    std::string sdata(std::istreambuf_iterator<char>{ifs}, {});
+    ifs.close();
+
+    try {
+        const dpp::json json = dpp::json::parse(sdata);
+        if (json.is_object()) {
+            auto json_user_target = json.find("target");
+            if (json_user_target != json.end())
+                user.target = *json_user_target;
+        }
+    }
+    catch (const std::exception &exception) {
+        std::cerr << "[Exception] " << exception.what() << std::endl;
+    }
+}
+
 void file::cache_guild(dpp::snowflake guild_id, std::vector<dpp::snowflake> &channels)
 {
     const std::filesystem::path guild_file = m_storagePath / "guild" / (std::to_string(guild_id) + ".json");
@@ -498,6 +562,31 @@ void file::list_guilds(std::vector<dpp::snowflake> &guilds)
     }
 }
 
+
+void file::list_users(std::vector<dpp::snowflake> &users)
+{
+    const std::filesystem::path user_dir = m_storagePath / "user";
+
+    if (!std::filesystem::is_directory(user_dir))
+        return;
+
+    for (const auto &user_file : std::filesystem::directory_iterator(user_dir)) {
+        const std::filesystem::path &user_file_path = user_file.path();
+        if (user_file_path.extension() == ".json") {
+            const std::string user_filename = user_file_path.stem().generic_string();
+            if (std::all_of(user_filename.begin(), user_filename.end(), ::isdigit)) {
+                try {
+                    dpp::snowflake user_id = std::stoull(user_filename);
+                    users.push_back(user_id);
+                }
+                catch (const std::exception &exception) {
+                    std::cerr << "[Exception] " << exception.what() << std::endl;
+                }
+            }
+        }
+    }
+}
+
 void file::sync_cache()
 {
     const std::lock_guard<std::mutex> guard(m_mutex);
@@ -570,4 +659,34 @@ void file::sync_cache()
     else {
         std::cerr << "[Error] Storage guild directory can not be created" << std::endl;
     }
+
+    const std::filesystem::path user_dir = m_storagePath / "user";
+    bool user_dir_exists = std::filesystem::is_directory(user_dir);
+    if (!user_dir_exists)
+        user_dir_exists = std::filesystem::create_directory(user_dir);
+
+    if (user_dir_exists) {
+        for (auto user = m_userCache.begin(); user != m_userCache.end();) {
+            dpp::json user_json = {
+                {"target"s, user->target}
+            };
+
+            const std::filesystem::path user_file = m_storagePath / "user" / (std::to_string(user->id) + ".json");
+            std::ofstream ofs(user_file, std::ios::out | std::ios::binary | std::ios::trunc);
+            if (ofs.is_open()) {
+                ofs << user_json.dump();
+                bool ok = ofs.good();
+                ofs.close();
+                if (ok)
+                    user = m_userCache.erase(user);
+                else
+                    user++;
+            }
+            else
+                user++;
+        }
+    }
+    else {
+        std::cerr << "[Error] Storage user directory can not be created" << std::endl;
+    }
 }
diff --git a/src/database/file/file.h b/src/database/file/file.h
index f34bd4d..daceefd 100644
--- a/src/database/file/file.h
+++ b/src/database/file/file.h
@@ -48,14 +48,19 @@ namespace bot {
             std::vector<bot::settings::target> get_channel_targets(dpp::snowflake guild_id, dpp::snowflake channel_id) override;
             */
             std::vector<dpp::snowflake> get_guilds() override;
+            bot::settings::user get_user(dpp::snowflake user_id) override;
+            std::vector<dpp::snowflake> get_users() override;
             void set_channel_source(dpp::snowflake guild_id, dpp::snowflake channel_id, const std::string &source) override;
+            void set_user_target(dpp::snowflake user_id, const std::string &target) override;
             bool sync() override;
 
         private:
             void cache_add_channel(dpp::snowflake guild_id, dpp::snowflake channel_id);
             void cache_get_channel(dpp::snowflake channel_id, bot::settings::channel &channel);
+            void cache_get_user(dpp::snowflake user_id, settings::user &user);
             void cache_guild(dpp::snowflake guild_id, std::vector<dpp::snowflake> &channels);
             void list_guilds(std::vector<dpp::snowflake> &guilds);
+            void list_users(std::vector<dpp::snowflake> &users);
             void sync_cache();
 #if defined(__unix__)
             int fd;
@@ -64,6 +69,7 @@ namespace bot {
 #endif
             std::vector<bot::database::guild> m_channelCache;
             std::vector<bot::settings::guild> m_dataCache;
+            std::vector<bot::settings::user> m_userCache;
             std::mutex m_mutex;
             std::filesystem::path m_storagePath;
         };