[Hippy]

$vbphrase[post_thanks_user_says]

admincp
Languages & Phrases
search for

The Following User Says Thank You to {1} For This Useful Post:

make sure you have Phrase Text and Phrase Variable Name checked before you hit find
then edit it to

what you like you need to leave {1} tho anything else you can change

example

changet to The Following User Said Thank's to {1} For This Post yhen hit save