Scalar found where operator expected near ""/language/$language/widget[\@ID="$id"

String found where operator expected near "$id"]""

syntax error near ""/language/$language/widget[\@ID="$id"

##</code><code>##

"/language/$language/widget[\@ID="$id"]"  - Error
"/language/$language/widget[\@ID='$id']"  - OK
"/language/$language/widget[\@ID=$id]"    - OK