How to manage Genres

i don’t understand…
For one reason or another all my movies are a bit bad scraped for genres. I mean: A movie has a “animación” genre and “animation” genre ..i.e
I want to ONLY have the “spanish” genre … delete other genres … without re-scrapping Whole movies. I’m doing test with Genre module , but it’s a mess.

It’s possible to “map” NON spanish genres into spanish ones??…And so on: how could i scrape new movies writing only spanish genres?.

thxsss