public static Language fromEncoding(String encoding) {
        if (encoding == null) return UNKNOWN;

        return fromLowerCasedEncoding(Lowercase.toLowerCase(encoding));
    }
Returns the language from an encoding, or {@link #UNKNOWN} if it cannot be determined.

@param encoding The name of the encoding to derive the <code>Language</code> from.
@return the language given by the encoding, or {@link #UNKNOWN} if not determined.
linguistics/src/main/java/com/yahoo/language/Language.java