My understanding is that when you are a stylist and go into the makeover room that the text for what the customer wanted was never translated properly which caused people to fail the job.
In an old save I changed a sim into stylist profession. I played few days and I did 6 makeovers. 4 were checked as completed in the left toolotip (the green checkbox) and 2 of them failed.
The ones that failed were:
New clothes for party in home (1 of Everyday, 1 of Formal and 1 of Swimwear)
New Everyday clothes (2 of Everyday)
The ones that worked were:
New sleepwear
New facial hair
Total change (1 of Everyday, 1 of Formal, 1 of Sleepwear, 1 of Athletic and 1 of Swimwear)
Adult clothes (3 of Everyday, 2 of Formal, 1 of Sleepwear, 1 of Athletic, 3 of Swimwear, 1 of facial hair, 1 of hairdo)
I used all EP but Seasons (so no outdoor clothes) and the game is spanish.