routing.yml

# routing.yml

app_fr:
    resource: routing_fr.yml
    condition: "request.attributes.get('_locale') == 'fr'"
    
app_en:
    resource: routing_en.yml
    condition: "request.attributes.get('_locale') == 'en'"    
    
# routing_fr.yml

route1:
    path: /routeFR
    
# routing_en.yml

route2:
    path: /routeEN