queryLanguageCode property
The language code of query.
For example, "en-US". This field helps to better interpret the query. If a value isn't specified, the query language code is automatically detected, which may not be accurate. Language code should be in BCP-47 format, such as "en-US" or "sr-Latn". For more information, see Tags for Identifying Languages.
Implementation
core.String? queryLanguageCode;