Mixing Up Letters

Alisa says "bam packer" for graham cracker.

She puts a "k" sound where there should be a "t" sound at the end of words. For example, she says "shirk" for shirt. If I correct her, she'll say "shirt" once but then go back to saying "shirk". When Nana was visiting in January, Alisa was saying, "fruk" for fruit but it sounded like the 4-letter word f*ck! We couldn't help but laugh though as she kept asking for "more fuk".