Yes, sometimes language is complex without adding anything, but usually there's a reason. I like the example of "apparently" vs "ostensibly". Non-native speaker

Yes, sometimes language is complex without adding anything, but usually there's a reason. I like the example of "apparently" vs "ostensibly". Non-native speakers often either don't know the latter, or think it's a straight synonym, but, without getting into it too deeply, "ostensibly" is usually used to mean "apparently" with added doubt.