Lang

Lib for multi language support
Getting started
First - need to setup languages. For example with /setup command:
enLang = {
    user: { whatIsYourName: "What is your name?" },
    hello: "Hello!",
    onlyOnEnglish: "Only on english"
}
​
ruLang = {
    user: { whatIsYourName: "Как тебя зовут?" },
    hello: "Привет!"
    // not translated yet:
    // onlyOnEnglish: "Only on english"
}
​
// first language is default language
Libs.Lang.setup("en", enLang);
Libs.Lang.setup("ru", ruLang);
Now default language is "english".
You can use lib now:
Bot.sendMessage(Libs.Lang.t("hello"))   // Hello!
Bot.sendMessage(Libs.Lang.t("user.whatIsYourName"))  // What is your name?
​
Bot.sendMessage(Libs.Lang.t("hello", "ru"))   // Привет!
​
Bot.sendMessage(Libs.Lang.t("onlyOnEnglish")) // "Only on english"
// Default language text is used
//  for non translated keys yet
​
Bot.sendMessage(Libs.Lang.t("onlyOnEnglish", "ru")) // "Only on english"
​
How to use
Change user lang
Libs.Lang.user.setLang("ru")
You can get user language code. For example in /start:
// in /start command
lang_code = request.from.language_code;
Libs.Lang.user.setLang(lang_code)
Get cur lang
var lang = Libs.Lang.user.getLang()
Change default lang
Libs.Lang.default.setLang("en")
var default = Libs.Lang.default.getCurLang()
Tips. Also you can use multi lang command.
For example: /hello_en and /hello_ru
In BJS for command /hello:
Bot.runCommand("/hello_" + Libs.Lang.user.getLang())
Also you can use 
Libs.Lang.t("translation-key", "ru") 
for non user actions: in webhooks and etc
​
Get all language json
// get all json for default language:
Bot.sendMessage(Libs.Lang.get())
​
// get all json for "ru":
Bot.sendMessage(Libs.Lang.get("ru"))
​
Using aliases
You can set aliases for language.
For /setup
enLang = {
    aliases: {
       "home, dashboard, /main": "/start",
       "alias1,alias2": "/otherCommand"
    }
    user: { whatIsYourName: "What is your name?" },
}
​
Libs.Lang.setup("en", enLang);
For Master command * :
// find multilanguage aliases
var cmd = Libs.Lang.getCommandByAlias(message);
if(cmd){ Bot.run({ command: cmd }) }
​
// also it is possible define language
// var cmd = Libs.Lang.getCommandByAlias(message, "ru");
// if(cmd){ Bot.run({ command: cmd }) }
 
Good practices
Use different language files (command) for each language.
For example "lng-en.js", "lng-fr.js" and etc. So it's easier to translate. 
In /setup you can make something like this:
var languages = ["en", "es", "cn", "ru"];
for(var i in languages){
    cmdName = "lng-" + languages[i].code;
    Bot.run({ command: cmdName })
}
​
Bot.sendMessage("Multi Languages - installed");
Make a simple command based structure
enLang = {
    command1: {
      // keys
    }
    command2: {
      // keys
    }
    //...
}
​
Libs.Lang.setup("en", enLang);
Make translation for text and keyboard:
enLang = {
    command1: {
       text: "Please confirm",
       keyboard: "Yes, Cancel" 
    }
    //...
}
​
Libs.Lang.setup("en", enLang);
So in /command1 you can make:
Bot.sendKeyboard(
   Libs.Lang.t("command1.keyboard"),
   Libs.Lang.t("command1.text"),
)
Use aliases translations
See this​
​
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