Copy the highlighted text and change it to something else

Let's say I have a text in my code.

`<input placeholder="Email Address">`

When I highlight Email Address and click a shortcut that I defined, I want 2 things:

1. Copy the "Email Address" to be copied in my clipboard

2. Turn it into `{{ trans.get('Email Address') }}` so the outcome becomes `<input placeholder="{{ trans.get('Email Address') }}">`

I couldn't figure out how to achieve it? I checked Editor External Tools but couldn't figure out if that's what I need.

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As a bonus step, it can check a json file in a specified directory, check if string is added as json key, if not, add it there 

Only if I learn the terminology for it, or a source that I can read about it, I think I'd figure it out - but full example is highly appreciated :)