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Internationalization
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====================
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Internationalization (I18N) refers to the process of designing a software application so that it can be adapted to
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various languages and regions without engineering changes. For Web applications, this is of particular importance
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because the potential users may be worldwide.
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When developing an application it's assumed that we're relying on
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[PHP internationalization extension](http://www.php.net/manual/en/intro.intl.php). While extension covers a lot of aspects
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Yii adds a bit more:
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- It handles message translation.
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Locale and Language
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-------------------
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Translation
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-----------
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/*
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numeric arg \{\s*\d+\s*\}
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named arg \{\s*(\w|(\w|\d){2,})\s*\}
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named placeholder can be unicode!!!
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argName [^[[:Pattern_Syntax:][:Pattern_White_Space:]]]+
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message = messageText (argument messageText)*
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argument = noneArg | simpleArg | complexArg
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complexArg = choiceArg | pluralArg | selectArg | selectordinalArg
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noneArg = '{' argNameOrNumber '}'
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simpleArg = '{' argNameOrNumber ',' argType [',' argStyle] '}'
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choiceArg = '{' argNameOrNumber ',' "choice" ',' choiceStyle '}'
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pluralArg = '{' argNameOrNumber ',' "plural" ',' pluralStyle '}'
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selectArg = '{' argNameOrNumber ',' "select" ',' selectStyle '}'
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selectordinalArg = '{' argNameOrNumber ',' "selectordinal" ',' pluralStyle '}'
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choiceStyle: see ChoiceFormat
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pluralStyle: see PluralFormat
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selectStyle: see SelectFormat
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argNameOrNumber = argName | argNumber
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argName = [^[[:Pattern_Syntax:][:Pattern_White_Space:]]]+
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argNumber = '0' | ('1'..'9' ('0'..'9')*)
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argType = "number" | "date" | "time" | "spellout" | "ordinal" | "duration"
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argStyle = "short" | "medium" | "long" | "full" | "integer" | "currency" | "percent" | argStyleText
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*/
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