Try to fix it

"I kinha wanna fixth it..." Jane said, her tongue already starting to ache from the pulling.
"Aaaww... wreally?" Lindsey returned, giving her friend a mock sad face. "Awright, buht yer doin' iht."

Jane picked up the book, looking through it at an odd angle, pulling on their tongue. It was hard to read this way, but she did her best. Eventually, she came across a spell that might do the trick; "The efthects of thiths book shall be inthalidathed; the book shall have tho be clothed."
"Clothed? You githing ith clothes?" Lindsey teased.
"Shut up!"

Jane looked over the word again and again, then after careful consideration of it's pronunciation, she closed the book and gave it a shot; "Phoorthathath!"
Nothing happened.
"P-Phoorthathath..!"
Nothing again.
"P-P-... Phoorthathath!... Phoorthathath, phoorthathath!!" She yelled repeatedly. Nothing was happening.
"Thath's not righth..." Linsey said, thinking. "Y-you're thaying ith wrong! W-we canth thalk like thith!"
Jane's eyes went wide as she realized what was wrong.

She couldn't say the spell because her tongue was fused to Lindsey's. The only way to get her tongue away from Lindsey's is to say the spell.

She was horrified. Her breathing began to quicken, her heart started to race. She pulled on their shared tong-
"Jane! Jane!... Calm down. W-we'll call a fhriend."

...Oh. She could do that, too. She had plenty of friends, though.