public TransliterationInterface::transliterate($string, $langcode = 'en', $unknown_character = '?', $max_length = NULL)
Transliterates text from Unicode to US-ASCII.
Parameters
string $string: The string to transliterate.
string $langcode: (optional) The language code of the language the string is in. Defaults to 'en' if not provided. Warning: this can be unfiltered user input.
string $unknown_character: (optional) The character to substitute for characters in $string without transliterated eq