Spell check enabling

When using the search.html or search.json end point, when we configure the spell check, will that start to send back results i.e if customer . types in ‘branches’ incorrectly and types in ‘braches’ instead, will they see showing results for ‘branches’.
In other words, spell-check combined with auto-correct

P.S. - I know this can be als done in synonym but what can we do from spell-check / auto-correct perspective

You can configure query blending with the SPEL source to do this.