Glossary entry (derived from question below)
English term or phrase:
from a diverse representation of cultures
Italian translation:
tratti / a partire da una selezione rappresentativa di culture, ...
English term
Italy
Native in: Italian 
Works in: English to Italian, French to Italian, Russian to Italian
from a diverse representation of cultures
Oct 19, 2020 07:42: martini Created KOG entry
Non-PRO (2): Francesco Badolato, Daniela Cannarella
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Proposed translations
tratti / a partire da una selezione rappresentativa di culture, ...
qui representation è sostantivo, ma in IT ha altro significato
https://www.treccani.it/vocabolario/rappresentativa_(Sinonim...
da qui la resa come sopra
Italy
Quality, accuracy and reliability
Native in: Italian (Variant: Standard-Italy) 
Works in: English to Italian, French to Italian, Spanish to Italian
rappresentazione eterogenea di culture / di svariate culture / delle culture più diverse/disparate
da una gran varietà di culture
La mia proposta:
Analizza testi letterari da una gran varietà di culture, generi e periodi storici
Buon lavoro!
Italy
English-Spanish to Italian translator
Native in: Italian , Sardinian
Works in: English to Italian, Spanish to Italian
Diverse realtà culturali
Translation Studies, PhD | UK based
Native in: Italian
Works in: English to Italian, French to Italian
scelti per rappresentare culture
Analyze literary texts from a diverse representation of cultures, genres and time periods =
Analizza testi scelti per rappresentare culture, generi e periodi diversi
Italy
International сooperation
Native in: Italian
Works in: English to Italian, Russian to Italian, Italian to English
... rappresentativi di una varietà di culture, generi ed epoche letterarie
Ho inteso 'diverse' senza dubbio nell'accezione di 'vario', 'numeroso';
letteralmente dunque tradurrei: 'a partire da una numerosa rappresentazione di culture'.
Poiché nessun dizionario assegna a 'representation' un qualche significato vicino a 'varietà', 'selezione', 'quantità', preferirei trasformarlo in un aggettivo e cambiare la frase come ho indicato: così mi appare anche più precisa.
Spero di esserLe stata utile!
Saluti
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