Calm down. First of all check to make sure that you have all everything you need to make the the waterning thing. If you have all the items, then maybe you don't have enough skill points. So go fill whatever skill points you need. If you have the right amount of skill points and items, then you might not have the correct tolls or working bench. if you have done all of that, then you shouldn't have a problem making anhthing.
Obviously you're new to the Sims series... but just to let you know, no matter what language you select, the sims will always speak ther same language. No one has any idea what they're saying. It's like that for EVERY sims game
My tribute to the REAL speed racer.