Every language has helper-words like “like” and “um”. It’s not imprecise, it’s context-specific. English doesn’t have official formal/informal, and languages naturally fill lacunae
The hill I will die on: I really don’t like ‘like’ – or other imprecise and redundant speech | Louis de Bernières
Junk speak, like junk food, encourages verbal littering. It has to be one of the worst things about life in Britain, says author Louis de Bernières