/usr/share/guile/2.0/language/ is in guile-2.0-libs 2.0.9+1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/guile/2.0/language/assembly/
/usr/share/guile/2.0/language/assembly.scm
/usr/share/guile/2.0/language/assembly/compile-bytecode.scm
/usr/share/guile/2.0/language/assembly/decompile-bytecode.scm
/usr/share/guile/2.0/language/assembly/disassemble.scm
/usr/share/guile/2.0/language/assembly/spec.scm
/usr/share/guile/2.0/language/brainfuck/
/usr/share/guile/2.0/language/brainfuck/compile-scheme.scm
/usr/share/guile/2.0/language/brainfuck/compile-tree-il.scm
/usr/share/guile/2.0/language/brainfuck/parse.scm
/usr/share/guile/2.0/language/brainfuck/spec.scm
/usr/share/guile/2.0/language/bytecode/
/usr/share/guile/2.0/language/bytecode/spec.scm
/usr/share/guile/2.0/language/ecmascript/
/usr/share/guile/2.0/language/ecmascript/array.scm
/usr/share/guile/2.0/language/ecmascript/base.scm
/usr/share/guile/2.0/language/ecmascript/compile-tree-il.scm
/usr/share/guile/2.0/language/ecmascript/function.scm
/usr/share/guile/2.0/language/ecmascript/impl.scm
/usr/share/guile/2.0/language/ecmascript/parse.scm
/usr/share/guile/2.0/language/ecmascript/spec.scm
/usr/share/guile/2.0/language/ecmascript/tokenize.scm
/usr/share/guile/2.0/language/elisp/
/usr/share/guile/2.0/language/elisp/bindings.scm
/usr/share/guile/2.0/language/elisp/compile-tree-il.scm
/usr/share/guile/2.0/language/elisp/lexer.scm
/usr/share/guile/2.0/language/elisp/parser.scm
/usr/share/guile/2.0/language/elisp/runtime/
/usr/share/guile/2.0/language/elisp/runtime.scm
/usr/share/guile/2.0/language/elisp/runtime/function-slot.scm
/usr/share/guile/2.0/language/elisp/runtime/macros.scm
/usr/share/guile/2.0/language/elisp/runtime/subrs.scm
/usr/share/guile/2.0/language/elisp/runtime/value-slot.scm
/usr/share/guile/2.0/language/elisp/spec.scm
/usr/share/guile/2.0/language/glil/
/usr/share/guile/2.0/language/glil.scm
/usr/share/guile/2.0/language/glil/compile-assembly.scm
/usr/share/guile/2.0/language/glil/spec.scm
/usr/share/guile/2.0/language/objcode/
/usr/share/guile/2.0/language/objcode/spec.scm
/usr/share/guile/2.0/language/scheme/
/usr/share/guile/2.0/language/scheme/compile-tree-il.scm
/usr/share/guile/2.0/language/scheme/decompile-tree-il.scm
/usr/share/guile/2.0/language/scheme/spec.scm
/usr/share/guile/2.0/language/tree-il/
/usr/share/guile/2.0/language/tree-il.scm
/usr/share/guile/2.0/language/tree-il/analyze.scm
/usr/share/guile/2.0/language/tree-il/canonicalize.scm
/usr/share/guile/2.0/language/tree-il/compile-glil.scm
/usr/share/guile/2.0/language/tree-il/cse.scm
/usr/share/guile/2.0/language/tree-il/debug.scm
/usr/share/guile/2.0/language/tree-il/effects.scm
/usr/share/guile/2.0/language/tree-il/fix-letrec.scm
/usr/share/guile/2.0/language/tree-il/inline.scm
/usr/share/guile/2.0/language/tree-il/optimize.scm
/usr/share/guile/2.0/language/tree-il/peval.scm
/usr/share/guile/2.0/language/tree-il/primitives.scm
/usr/share/guile/2.0/language/tree-il/spec.scm
/usr/share/guile/2.0/language/value/
/usr/share/guile/2.0/language/value/spec.scm