A handy feature in Photoshop is the Spell Check option for type layers.
It can be used for a single type layer, a single word, but also for multiple type layers at once.

Below is an example of two separate Paragraph type layers and in each paragraph is an intended misspell, to put Photoshop to the test.
You can also test this yourself.

Spell Check multiple=

Before we begin, open the ‘Window/Character’ palette and towards the bottom choose your Language Dictionary preference to check the spelling against, as I have captured below.

Spell Check multiple=

With a Type Layer active, as in the above example, next go to ‘Edit/Check Spelling…’ menu command, as I have captured below.

Spell Check multiple=

It immediately picked up my first of two spell errors.

Make sure the ‘Check All Layers’ is ticked towards the bottom as I have encased in red below.
Proceed to correct by typing it into the ‘Change To’ field or select it from the ‘Suggestions’ list.

Spell Check multiple=

Photoshop proceeds and picked up the second of two spell errors and found a correct suggestion from the list.

Click the ‘Change’ command option…

Spell Check multiple=

…and Photoshop prompts me that ‘Spell Check is Complete’.

Certainly, a great feature for multiple text blocks and a good proof reading dosn’t hurt before passing your comp onto the client.