Are language and country will be collected automatically for custom events as well or should I add them explicitly as params?

For example in Android we can create the following custom event when a user opens details screen of some item:

firebaseAnalytics.logEvent("item_details_screen") {
    param("item_id", "123")
    param("language", "en") // should I include it?
    param("country", "us") // should I include it?
}

Typically collected automatically for all events, including custom events.Not necessarily needed to add explicitly as it is part of firebase's standard metadata collection