Remove duplicates from list

[kamaridesu]

Hi there!,

I really hope the comunity here is active, i have a problem that i been trying to crack for 1 week now 😞

basicly i have a list of languages that i get from a virtual column that find it in a parent table, and the result is 

so what i want to achieve is to remove the duplicates, and i already googled it and tried bunch of options like

but does not want to work, any ideas?