Locale to interpret the SimpleQuery.query_string in.
If possible, locale-specific query string transliteration is done to increase the number of matches. Set this property to a POSIX locale name (e.g. ‘en’, ‘de_DE’, ‘de_DE@euro’ or ‘C’) to potentially improve the transliteration performed.
This may be `null` if the locale is unknown, in which case the current locale will be used. To perform transliteration for no specific locale, use `C`.
0.11.0