Queries of the form:
?s text:query "some string"@lang-code
return no results even when there are matches found by the equivalent:
?s text:query ("some string" "lang:lang-code")
Note the above equivalent form is currently valid only if
A reasonable fix is to recognize the rdf:langString case and treat it as the equivalent form referring to the text:defautlField; otherwise, at least an error should be indicated.