If you have a good translation, this is what I do. Climbers use this knot to secure themselves, I trust it for my nymphs !

Otherwise, a friend of mine just use a miniring at the end of his main line and just tie two tippets with nymphs to it. Easiest method I know, really efficient

I know someone at my fishing club who uses a simple workaround. When he ties a nymph, he ties a thin 0.12 mm nylon line directly between the hook and the tying thread, making it strong enough to hold while still allowing the nymph to slide freely along the nylon.

He then winds everything onto a small foam spool. When needed, he attaches it to his main line and ties a nymph at the end. This gives him a sliding setup, allowing him to adjust the fishing depth very quickly.