Jezler Baguette .800 alloy is 80% silver and 20% copper. It does not age, so absolutely safe to use. Go ahead, use it daily. Visible wear after years and decades of use create character and are fine. My coffee spoon is more than 200 years old, my daily flatware is also Jezler Baguette, more than 100 years old. This is no problem.
Spoons and forks are dishwasher safe. Also, feel free to mix it with other flatware, for example stainless steel, in the dishwasher. It may tarnish while using it, mainly due to contact with food containing sulfur. (Eggs, Sauerkraut, Eggplant, Zucchini....) If this is the case, hand polish it.
Just be careful with the knives in the dishwasher. The blade may come out. You can test it the hard way: Put one knife in 80-90 dec C water for 15 minutes and observe it.
If the blade starts coming out, it is not dishwasher safe. (Using heatproof gloves, push the blade back in the handle while it is still warm and quench it in cold water, then it is fine again.
If necessary, consider buying a used set of dishwasher proof Baguette knives. If you contact me, I can give tips where.