The shirt Lea wears when she jumps into her fathers body says "Bubba Gump Shrimp Co.". This is supposed to be in 1991. Forest Gump didn't come out till 1994.
Ismael's guitar is covered in partially worn off band names. Radiohead and Blur are included. Radiohead released their first ever single in 1992.
Stephane is wearing Hollister shorts but Hollister didn't exist in 1991 as it was founded nine years later in 2000.
Character Pierre-Yves is a UNC Tar Hells fan; as he is seen is his first appearance in the first episode of The 7 Lives of Lea wearing a sky blue UNC jersey. He is also seen in a Green Bay Packers jersey in episode three of the first season of the series.