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In visual media - there's been a few that have worked quite well (either with limited vocalizations, indecipherable vocalizations or none). Some noteworthy examples - Groot (from Guardians of The ...
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Source: https://writers.stackexchange.com/a/41847 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
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In visual media - there's been a few that have worked quite well (either with limited vocalizations, indecipherable vocalizations or none). Some noteworthy examples - Groot (from _Guardians of The Galaxy_), and Chewbacca (from _Star Wars_) both have limited vocalizations that are indecipherable to the viewer but can be inferred by the reactions of other characters who understand them. Silent Bob (from _Clerks_), as his name implies is largely silent - communicating mainly through gestures and expressions (although in some films he does occasionally speak) It's more difficult to do if the character is the main protagonist as it's harder for the viewer to relate to them effectively - they tend to work better when they have others to play off and can be exceptionally effective when lined up alongside a particularly chatty character. That said they **can** be done as a main protagonist to great effect - the example that comes to mind is Wall-E (from the film of the same name), in this case though there is very little dialogue in the film so isn't _quite_ the same as what you are looking for.