Comma separated list from select labels

I'm in V3 Beta 24 and I'm struggling with something. I have a select with multiple options. Like countries for example, with key/value pairs. In the template I can do:

{{ countries | raw | list }}

that outputs a comma separated list of the raw values. Whould output en, es, fr for instance.

What I want is english, spanish, french but can't figure it out. Thank you!

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