If a person loses the ability to speak through any language, but tries to speak in either case, assuming that they can still vocalize sound (regardless of what that sound is), the rhythm of whatever sound they'd make will always be within the same rhythm of what they intended to say. What's more, whatever they'd vocalize will always carry, through the nuance of intent, whatever meanings that would've existed within their sounds, should they had been spoken language, to begin with.
This applies to realism things like damaged voice boxes or gags over mouth, and it applies to fantasy things such as transformations; a human-turned-dog's barks would behave through this manner, and a human-turned-cat's meows would do so, as well, etc.
Anyone who shows vocalization differently than what's been described here are using what amounts to narration devices. Narrative devices count as tells of something being different than the actual thing. Therefore, care must be taken to make sure narrative devi