Language sync and add back some contents (#575)

* Force syncing contents to Russian documents

* Add NFT note to front page

* Update Histories

* Update command usage

docs/en/document/command.md

@@ -51,7 +51,12 @@ Default "json".
 
 The -test flag tells Xray to test config files only,
 without launching the server
+
+The -dump flag tells Xray to print the merged config.
 ```
+::: tip
+Except from the default JSON format, config can also use TOML and YAML. It will automatically recognized from file extensions when the `-format` flag is not set.
+:::
 
 ### xray version
 
@@ -84,6 +89,59 @@ xray api <command> [arguments]
         rmo           Remove outbounds
 ```
 
+### xray convert
+
+Convert config to protobuf, or convert typedMessage to JSON
+
+usage:
+
+```
+xray convert <command> [arguments]
+
+The commands are:
+
+        pb           Convert multiple json configs to protobuf
+        json         Convert typedMessage to json
+```
+
+Sub-command `pb`
+```bash
+# Usage: xray convert pb [-debug] [-type] [json file] [json file] ...
+
+# mix three config files to mix.pb
+xray convert pb c1.json c2.json c3.json > mix.pb
+
+# Use -debug option to view the content of mix.pb
+xray convert pb -debug mix.pb
+
+# Start Xray-core with mix.pb
+xray -c mix.pb
+
+# Detailed usage
+xray help convert pb
+```
+
+Sub-command JSON
+```bash
+# Usage: xray convert json [-type] [stdin:] [typedMessage file]
+
+tmsg='{
+  "type": "xray.proxy.shadowsocks.Account",
+  "value": "CgMxMTEQBg=="
+}'
+
+echo ${tmsg} | xray convert json stdin:
+
+# Outputs from above:
+'{
+  "cipherType": "AES_256_GCM",
+  "password": "111"
+}'
+
+# Detailed usage
+xray help convert json
+```
+
 ### xray tls
 
 Some tools related to TLS.
@@ -95,8 +153,9 @@ xray tls <command> [arguments]
 ```
 
 ```
-        cert         Generate TLS certificates
-        ping         Ping the domain with TLS handshake
+        cert          Generate TLS certificates
+        ping          Ping the domain with TLS handshake
+        certChainHash Calculate TLS certificates hash.
 ```
 
 ### xray uuid