google analytics - Combine Languages in pie chart -

under audience->geo->language see many country codes:

1.  fr 2.  fr-fr 3.  en-us    4.  fr-ch 5.  en-gb 6.  de 7. ... .... 

etc.

i combine these similar country codes regex fr($|[-_]) pie chart.

so fr-*,en-,de-,it- wil show on pie % values. fr ist 30%, en 28% etc. widget great.

i able create segments, list these values. not in pie chart. screenshot

you have create new view on property "search , replace" filter on view transform french types single french type.

your view configuration might this:

you should able pull pie chart reports on these languages via basic geo > language reports.