Explain one possible obstacle that could result in an error when trying to locate mustard in a grocery store

A possible obstacle which may be responsible for an error in trying to locate a mustard seed is if it was placed in the wrong section in the store. This could be frustrating at times and a seed similar to it can be mistakenly picked with the assumption that it is the mustard seed.

Language barrier on the container /wrapper may also be responsible for this error.