diff --git a/apps/emqx_dashboard/src/emqx_dashboard_error_code_api.erl b/apps/emqx_dashboard/src/emqx_dashboard_error_code_api.erl
index 47ba02ebf..b0e24527f 100644
--- a/apps/emqx_dashboard/src/emqx_dashboard_error_code_api.erl
+++ b/apps/emqx_dashboard/src/emqx_dashboard_error_code_api.erl
@@ -63,7 +63,7 @@ schema("/error_codes/:code") ->
         'operationId' => error_code,
         get => #{
             security => [],
-            description => ?DESC(error_codes_u),
+            description => ?DESC(error_codes),
             tags => [<<"Error Codes">>],
             parameters => [
                 {code,
diff --git a/apps/emqx_dashboard/src/emqx_dashboard_monitor_api.erl b/apps/emqx_dashboard/src/emqx_dashboard_monitor_api.erl
index e80b2da31..a152531f1 100644
--- a/apps/emqx_dashboard/src/emqx_dashboard_monitor_api.erl
+++ b/apps/emqx_dashboard/src/emqx_dashboard_monitor_api.erl
@@ -65,7 +65,7 @@ schema("/monitor_current") ->
         'operationId' => monitor_current,
         get => #{
             tags => [<<"Metrics">>],
-            description => ?DESC(current_status),
+            description => ?DESC(current_stats),
             responses => #{
                 200 => hoconsc:mk(hoconsc:ref(sampler_current), #{})
             }
@@ -76,7 +76,7 @@ schema("/monitor_current/nodes/:node") ->
         'operationId' => monitor_current,
         get => #{
             tags => [<<"Metrics">>],
-            description => ?DESC(current_status_node),
+            description => ?DESC(current_stats_node),
             parameters => [parameter_node()],
             responses => #{
                 200 => hoconsc:mk(hoconsc:ref(sampler_current), #{}),
diff --git a/apps/emqx_ft/src/emqx_ft_schema.erl b/apps/emqx_ft/src/emqx_ft_schema.erl
index c1ee41d0d..7a6067b2d 100644
--- a/apps/emqx_ft/src/emqx_ft_schema.erl
+++ b/apps/emqx_ft/src/emqx_ft_schema.erl
@@ -72,6 +72,7 @@ fields(file_transfer) ->
                 #{
                     desc => ?DESC("init_timeout"),
                     required => false,
+                    importance => ?IMPORTANCE_LOW,
                     default => "10s"
                 }
             )},
@@ -81,6 +82,7 @@ fields(file_transfer) ->
                 #{
                     desc => ?DESC("store_segment_timeout"),
                     required => false,
+                    importance => ?IMPORTANCE_LOW,
                     default => "5m"
                 }
             )},
@@ -90,6 +92,7 @@ fields(file_transfer) ->
                 #{
                     desc => ?DESC("assemble_timeout"),
                     required => false,
+                    importance => ?IMPORTANCE_LOW,
                     default => "5m"
                 }
             )},
diff --git a/apps/emqx_management/src/emqx_mgmt_api_trace.erl b/apps/emqx_management/src/emqx_mgmt_api_trace.erl
index 579f977d8..27789fff9 100644
--- a/apps/emqx_management/src/emqx_mgmt_api_trace.erl
+++ b/apps/emqx_management/src/emqx_mgmt_api_trace.erl
@@ -206,7 +206,7 @@ fields(log_file_detail) ->
     fields(node) ++
         [
             {size, hoconsc:mk(integer(), #{description => ?DESC(file_size)})},
-            {mtime, hoconsc:mk(integer(), #{description => ?DESC(modification_date)})}
+            {mtime, hoconsc:mk(integer(), #{description => ?DESC(file_mtime)})}
         ];
 fields(trace) ->
     [
@@ -214,7 +214,7 @@ fields(trace) ->
             hoconsc:mk(
                 binary(),
                 #{
-                    description => ?DESC(format),
+                    description => ?DESC(trace_name),
                     validator => fun ?MODULE:validate_name/1,
                     required => true,
                     example => <<"EMQX-TRACE-1">>
diff --git a/rel/i18n/emqx_bridge_iotdb.hocon b/rel/i18n/emqx_bridge_iotdb.hocon
index d1ceecbe0..cb36bc5dd 100644
--- a/rel/i18n/emqx_bridge_iotdb.hocon
+++ b/rel/i18n/emqx_bridge_iotdb.hocon
@@ -42,7 +42,9 @@ config_is_aligned.label:
 """Align Timeseries"""
 
 config_device_id.desc:
-"""A fixed device name this data should be inserted for. If empty it must either be set in the rule action, the message itself, or it will be extracted from the topic."""
+"""The IoTDB device ID this data should be inserted for.
+If left empty, the MQTT message payload must contain a `device_id` field,
+or EMQX's rule-engine SQL must produce a `device_id` field."""
 config_device_id.label:
 """Device ID"""
 
diff --git a/rel/i18n/emqx_dashboard_error_code_api.hocon b/rel/i18n/emqx_dashboard_error_code_api.hocon
index 835f200ab..856501098 100644
--- a/rel/i18n/emqx_dashboard_error_code_api.hocon
+++ b/rel/i18n/emqx_dashboard_error_code_api.hocon
@@ -5,9 +5,4 @@ error_codes.desc:
 error_codes.label:
 """API Error Codes"""
 
-error_codes_u.desc:
-"""API Error Codes"""
-error_codes_u.label:
-"""API Error Codes"""
-
 }
diff --git a/rel/i18n/emqx_dashboard_monitor_api.hocon b/rel/i18n/emqx_dashboard_monitor_api.hocon
index 1d45c45ae..37da0cf5f 100644
--- a/rel/i18n/emqx_dashboard_monitor_api.hocon
+++ b/rel/i18n/emqx_dashboard_monitor_api.hocon
@@ -1,23 +1,23 @@
 emqx_dashboard_monitor_api {
 
 list_monitor.desc:
-"""List monitor data."""
+"""List monitor (statistics) data for the whole cluster."""
 list_monitor.label:
-"""List monitor data."""
+"""List cluster stats data"""
 
 list_monitor_node.desc:
-"""List the monitor data on the node."""
+"""List the monitor (statistics) data on the specified node."""
 list_monitor_node.label:
-"""List the monitor data on the node."""
+"""List node's stats data"""
 
-current_status.desc:
-"""Current status. Gauge and rate."""
-current_status.label:
-"""Current status. Gauge and rate."""
+current_stats.desc:
+"""Current monitor (statistics) data, e.g. number of connections and connection rate in the whole cluster."""
+current_stats.label:
+"""Cluster runtime stats"""
 
-current_status_node.desc:
-"""Node current status. Gauge and rate."""
-current_status_node.label:
-"""Node current status. Gauge and rate."""
+current_stats_node.desc:
+"""Node monitor (statistics) data, e.g. number of connections and connection rate on the specified node."""
+current_stats_node.label:
+"""Node runtime stats"""
 
 }
diff --git a/rel/i18n/emqx_ft_schema.hocon b/rel/i18n/emqx_ft_schema.hocon
index bafda331a..ac3921dcf 100644
--- a/rel/i18n/emqx_ft_schema.hocon
+++ b/rel/i18n/emqx_ft_schema.hocon
@@ -7,16 +7,16 @@ This toggle also affects the availability of the File Transfer REST API and
 storage-dependent background activities (e.g. garbage collection)."""
 
 init_timeout.desc:
-"""Timeout for initializing the file transfer.<br/>
-After reaching the timeout, `init` message will be acked with an error"""
+"""Timeout for EMQX to initialize the file transfer.<br/>
+After reaching the timeout (e.g. due to system is overloaded), the PUBACK message for `init` will contain error code (0x80)."""
 
 assemble_timeout.desc:
 """Timeout for assembling and exporting file segments into a final file.<br/>
-After reaching the timeout, `fin` message will be acked with an error"""
+After reaching the timeout (e.g. due to system is overloaded), the PUBACK message for `fin` will contain error code (0x80)"""
 
 store_segment_timeout.desc:
 """Timeout for storing a file segment.<br/>
-After reaching the timeout, message with the segment will be acked with an error"""
+After reaching the timeout (e.g. due to system overloaded), the PUBACK message will contain error code (0x80)."""
 
 storage_backend.desc:
 """Storage settings for file transfer."""
diff --git a/rel/i18n/emqx_mgmt_api_configs.hocon b/rel/i18n/emqx_mgmt_api_configs.hocon
index 3255806d0..292658900 100644
--- a/rel/i18n/emqx_mgmt_api_configs.hocon
+++ b/rel/i18n/emqx_mgmt_api_configs.hocon
@@ -6,9 +6,9 @@ get_conf_node.label:
 """Get all the configurations for node."""
 
 node_name.desc:
-"""Node's name: If you do not fill in the fields, this node will be used by default."""
+"""Node's name. If not specified, the configs on the node which receives the HTTP request will be returned."""
 node_name.label:
-"""Node's name."""
+"""Node's name"""
 
 rest_conf_query.desc:
 """Reset the config entry specified by the query string parameter `conf_path`.<br/>
diff --git a/rel/i18n/emqx_mgmt_api_listeners.hocon b/rel/i18n/emqx_mgmt_api_listeners.hocon
index b45f55977..c2330ecd7 100644
--- a/rel/i18n/emqx_mgmt_api_listeners.hocon
+++ b/rel/i18n/emqx_mgmt_api_listeners.hocon
@@ -3,12 +3,12 @@ emqx_mgmt_api_listeners {
 list_node_live_statuses.desc:
 """List all running node's listeners live status. group by listener type"""
 list_node_live_statuses.label:
-"""List all running node's listeners live status. group by listener type"""
+"""List listeners live status"""
 
 list_listeners.desc:
 """List all running node's listeners for the specified type."""
 list_listeners.label:
-"""List all running node's listeners for the specified type."""
+"""List listeners per type"""
 
 listener_type.desc:
 """Listener type"""
@@ -18,42 +18,37 @@ listener_type.label:
 create_on_all_nodes.desc:
 """Create the specified listener on all nodes."""
 create_on_all_nodes.label:
-"""Create the specified listener on all nodes."""
+"""Create listener"""
 
 list_by_id.desc:
 """List all running node's listeners for the specified id."""
 list_by_id.label:
-"""List all running node's listeners for the specified id."""
+"""List listeners per ID"""
 
 update_lisener.desc:
 """Update the specified listener on all nodes."""
 update_lisener.label:
-"""Update the specified listener on all nodes."""
-
-create_on_all_nodes_2.desc:
-"""Create the specified listener on all nodes."""
-create_on_all_nodes_2.label:
-"""Create the specified listener on all nodes."""
+"""Update listener"""
 
 delete_on_all_nodes.desc:
 """Delete the specified listener on all nodes."""
 delete_on_all_nodes.label:
-"""Delete the specified listener on all nodes."""
+"""Delete listener"""
 
 start_on_all_nodes.desc:
 """Start the listener on all nodes."""
 start_on_all_nodes.label:
-"""Start the listener on all nodes."""
+"""Start listener"""
 
 stop_on_all_nodes.desc:
 """Stop the listener on all nodes."""
 stop_on_all_nodes.label:
-"""Stop the listener on all nodes."""
+"""Stop listener"""
 
 restart_on_all_nodes.desc:
 """Restart listeners on all nodes."""
 restart_on_all_nodes.label:
-"""Restart listeners on all nodes."""
+"""Restart listener"""
 
 
 }
diff --git a/rel/i18n/emqx_mgmt_api_nodes.hocon b/rel/i18n/emqx_mgmt_api_nodes.hocon
index e875b0dcc..801cc778e 100644
--- a/rel/i18n/emqx_mgmt_api_nodes.hocon
+++ b/rel/i18n/emqx_mgmt_api_nodes.hocon
@@ -11,12 +11,12 @@ get_node_info.label:
 """Get node info"""
 
 get_node_metrics.desc:
-"""Get node metrics"""
+"""Get node run-time counter metrics. Such as received or sent bytes or messages, the number of succeeded or failed authentications or authorizations, etc."""
 get_node_metrics.label:
 """Get node metrics"""
 
 get_node_stats.desc:
-"""Get node stats"""
+"""Get node run-time stats. Such as the number of topics, connections, etc."""
 get_node_stats.label:
 """Get node stats"""
 
diff --git a/rel/i18n/emqx_mgmt_api_trace.hocon b/rel/i18n/emqx_mgmt_api_trace.hocon
index 4af68a460..a53dabae3 100644
--- a/rel/i18n/emqx_mgmt_api_trace.hocon
+++ b/rel/i18n/emqx_mgmt_api_trace.hocon
@@ -50,15 +50,15 @@ file_size.desc:
 file_size.label:
 """file size"""
 
-modification_date.desc:
-"""the modification and last access times of a file"""
-modification_date.label:
-"""last access time"""
+file_mtime.desc:
+"""The last time this file is modified."""
+file_mtime.label:
+"""file mtime"""
 
-format.desc:
-"""Unique and format by [a-zA-Z0-9-_]"""
-format.label:
-"""Unique and format by [a-zA-Z0-9-_]"""
+trace_name.desc:
+"""Unique name of the trace. Only ascii letters in a-z, A-Z, 0-9 and underscore '_' are allowed."""
+trace_name.label:
+"""Unique name of the trace"""
 
 filter_type.desc:
 """Filter type"""
@@ -66,19 +66,19 @@ filter_type.label:
 """Filter type"""
 
 support_wildcard.desc:
-"""support mqtt wildcard topic."""
+"""Specify the topic or topic filter if the trace 'type' is 'topic'."""
 support_wildcard.label:
-"""support mqtt wildcard topic"""
+"""MQTT Topic"""
 
 mqtt_clientid.desc:
-"""mqtt clientid."""
+"""Specify the MQTT clientid if the trace 'type' is 'clientid'."""
 mqtt_clientid.label:
-"""mqtt clientid"""
+"""MQTT clientid"""
 
 client_ip_addess.desc:
-"""client ip address"""
+"""Specify the client's IP address if the trace type is 'ip_address'."""
 client_ip_addess.label:
-"""client ip address"""
+"""Client IP Address"""
 
 trace_status.desc:
 """trace status"""
@@ -90,11 +90,6 @@ time_format.desc:
 time_format.label:
 """rfc3339 timestamp or epoch second"""
 
-time_format_g.desc:
-"""rfc3339 timestamp or epoch second"""
-time_format_g.label:
-"""rfc3339 timestamp or epoch second"""
-
 trace_log_size.desc:
 """trace log size"""
 trace_log_size.label:
diff --git a/scripts/spellcheck/dicts/emqx.txt b/scripts/spellcheck/dicts/emqx.txt
index 533269c87..03587aa54 100644
--- a/scripts/spellcheck/dicts/emqx.txt
+++ b/scripts/spellcheck/dicts/emqx.txt
@@ -52,7 +52,9 @@ PINGREQ
 PSK
 PSK
 PSKs
+PUBACK
 PUBREL
+PUBLISH
 QoS
 RESTful
 ROADMAP