iteraptor.rb

query = "course"

original = {
  "en"=>{
    "courses"=>"Courses",
    "layouts"=>{
      "navigation"=>{
        "desktop"=>{
          "browse_courses"=>"Browse Courses",
          "this_one"=>false
        }
      }
    },
    "unrelated"=>{
      "dont"=>{
        "include"=>"this, please"
      }
    }
  }
}

modified = original.iteraptor.map { |_, (key, value)|
  /#{query}/i.match?(String(value)) ? [key, value] : nil
}

modified #=> {
  "en"=>{
    "courses"=>"Courses",
    "layouts"=>{
      "navigation"=>{
        "desktop"=>{
          "browse_courses"=>"Browse Courses"
        }
      }
    },
    "unrelated"=>{
      "dont"=>[]
    }
  }
}