/usr/share/gocode/src/golang.org/x/text/language/ is in golang-golang-x-text-dev 0.0~git20170627.0.6353ef0-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/golang.org/x/text/language/common.go
/usr/share/gocode/src/golang.org/x/text/language/coverage.go
/usr/share/gocode/src/golang.org/x/text/language/coverage_test.go
/usr/share/gocode/src/golang.org/x/text/language/data_test.go
/usr/share/gocode/src/golang.org/x/text/language/display/
/usr/share/gocode/src/golang.org/x/text/language/display/dict.go
/usr/share/gocode/src/golang.org/x/text/language/display/dict_test.go
/usr/share/gocode/src/golang.org/x/text/language/display/display.go
/usr/share/gocode/src/golang.org/x/text/language/display/display_test.go
/usr/share/gocode/src/golang.org/x/text/language/display/examples_test.go
/usr/share/gocode/src/golang.org/x/text/language/display/lookup.go
/usr/share/gocode/src/golang.org/x/text/language/display/maketables.go
/usr/share/gocode/src/golang.org/x/text/language/display/tables.go
/usr/share/gocode/src/golang.org/x/text/language/examples_test.go
/usr/share/gocode/src/golang.org/x/text/language/gen_common.go
/usr/share/gocode/src/golang.org/x/text/language/gen_index.go
/usr/share/gocode/src/golang.org/x/text/language/go1_1.go
/usr/share/gocode/src/golang.org/x/text/language/go1_2.go
/usr/share/gocode/src/golang.org/x/text/language/httpexample_test.go
/usr/share/gocode/src/golang.org/x/text/language/index.go
/usr/share/gocode/src/golang.org/x/text/language/language.go
/usr/share/gocode/src/golang.org/x/text/language/language_test.go
/usr/share/gocode/src/golang.org/x/text/language/lookup.go
/usr/share/gocode/src/golang.org/x/text/language/lookup_test.go
/usr/share/gocode/src/golang.org/x/text/language/maketables.go
/usr/share/gocode/src/golang.org/x/text/language/match.go
/usr/share/gocode/src/golang.org/x/text/language/match_test.go
/usr/share/gocode/src/golang.org/x/text/language/parse.go
/usr/share/gocode/src/golang.org/x/text/language/parse_test.go
/usr/share/gocode/src/golang.org/x/text/language/tables.go
/usr/share/gocode/src/golang.org/x/text/language/tags.go