[dfxm12]

In what language(s)? Then you run out of room on the packaging/waste paper. The point of symbols is that they can tell more information in a smaller space and can be recognized universally.

Maybe you gotta look them up on your own, but after a while, you learn the ones you need to.

[etbebl]

Uh, how about in the primary language(s) used in the market where the detergent is sold? The other text on the bottle is already localized.